2011年高考英语总复习知识点精讲精析与高考试题预测Unit2Crossinglimits人教版大纲第三册

1、第三册 unit 2 crossing limitsi.单元知识点全览工欲善其事必先利其器 高考须掌握的词汇：1. evaluation 2. sick 3 . puzzled ; puzzling 4. variety ;different 5. equipment 6 . we81th 7 . o riginal 8. exist9 . abie 1o. suggestion高考须掌握的短语：1: in 2 . respect 3. possession 4 . rich 5 . run 6 . set 7 . of8. equipped 9 . apart lo. exchange 11

2、 . return12 . under 13 . up 14 . refern .考点过关过关斩将一马平川 考点详解精剖细解入市三分 一、重点词汇1. puzzle n .难题；谜vt .使困惑；使糊涂 eg：it s quite a puzzle to us why he did that .他为何做那样的事，我们完全搞不懂。this sentenc .e puzzles me . 这个句子令我困惑。i was puzzled how to solve the problem.我不知道怎样解决这个问题。相关链接：puzzling adj .令人困惑的 puzzled adj .感到迷惑的用法

3、拓展：sth . puzzle曲.某事使某人困惑一 sb.be puzzled 某人感到困惑的特别提醒： puzzled expression 困惑的表情puzzling expression令人困惑的表情案例剖析旁征博引举一反三考题 1 （典型例题 the question is so difficult that there was expression on the students faces .a . puzzle b . puzzling c . puzzled d . to puzzle考题1点拨：答案为co此题关键弄清楚“到底谁困惑”，老师还是同学。根据题意“困 惑？的应该是。

4、学生“，故用 c。puzzled expres sion”困惑的表情”，而 puzzlingexpression “令人困惑的表情”。句意为：”这道题太难了，学生们脸上露出了困惑的表情。”总结提示：分清 puzzling 和 puzzled 。2. suggest vt .向提议；建议；暗示 eg : are you suggesting that im not suitedfor the job?你是在暗示说我不适合那项工作吗？may l suggest going there by train?我建议大家坐火车去那里如何？i suggest to him that he should jo

5、in the club.我建议他应加入俱乐部。相关链接：suggestion n .建议用法拓展：suggest doing sth .建议做 su ggeststh . to s1）.向某人建议 suggest that - should建议某人干 it is suggestedthat should 建议 make a suggestion that should 建议特另1j提醒：suggest当“建议”讲，后面接从句时用（should）+动词原形的虚拟语气；而当“暗示”讲用陈述语气。考题 2-1 （典型例题）his pale face sug-gested that he ill an

6、d we all suggested that he at home for a few days.a. be; stayed b. was; stay c. was; stayed d. be; stay 考题 2-2 （ 典型例 题）the teacher agreed to the suggestion that the students two weeks to prepare for the exam.a. give b. should give c. be given d. would be given考题21点拨：答案为bo根据题意第一个suggest表示。暗示；表明”，应用陈述

7、语气； 而第二个suggest表示“建议”.应用 （should）+ 动词原形，可以省略 should。句意为“他苍白的面容表明他病了，我们建议他应该呆在 家里休息几天。”专题22点拨：答案为 c suggestion后的同位语从句应谊用shduld+动词原形”，叉因students与give是被动关系，故选 be given 。句意为；“老师同意这个建议，给学生两同时间准备考试。”总结提示：弄清suggest的含义是解题的关键。3. command n. & vt . 命令； 指挥 eg:the general commanded his men to attack the city.4各军

8、命令音b下攻城。he commanded that we should come at once . 他命令我们立亥u来。we are all under the command of him .我们都由他指挥。相关链接：commander n .司令员；指挥员用法拓展：command sb. to do sth .命令某人干某事 command that- should do 命令干 under the command of 由 指挥特另1j 提醒：command后面接从句时，从句用 should+动词原形，should可以省略。考题 3 （ 典型例题 分）how dare he comma

9、nd you here?-dont you know that we are all the command of him?a. stay; with b. to stay; with c. to stay; under d. staying; under考题 3 点拨；答案为 co 此题考查 command sb. to do sth .及 under the command of 两个短语.句意为：“他怎么敢命令你们呆在这儿？”-难道你不知道我们都由他来指挥？”总结提示：掌握command的用法。 二、重点短语4. run out 用完；耗尽 eg:the ink has run out

10、.墨水已用完了。用法拓展：run out of用完use up用完特别提醒：run out为不及物动词短语；run out of为及物动词短语。考题 4 （典型例题 we have to re-turn ahead of what we have planned, for the food we brought here a. is run.out b. was running out c, runs out of d. is running out考题 4 点拨：答案为 do 从 we have ti return ahead of what we have planned可知，食物不够用.

11、要提前退回。用现在进行时表将来。句意为；“我们不得不提前返回.因为我们带的食物快吃完了。”.总结提示：分清run out 和 run out of两短语。5. apart ftom 除开；除外尚有 eg:apart from a few faults 。 he is a respectable teacher .除两三个缺点外，他是个值得尊敬的老师。apart from the cost . the dress doesnt suit me .姑且不论价格，这件衣服也不适 合我穿。特别提醒：apart ftom 既含有except for 的含义，又含有 besides . in additi

12、on to 的考题 5 tom and jill, ten other students of this class took part in the sports meet.a. except b. but c. apart from d. as well考题5点拨：答案为c。此题关键抓住ten other students 。另外10个学生”排除掉 a, 而apart ftom 表示“除了还有”。句意为：“除了汤姆和吉尔。这个班还有lo个同学参加了运动会。”总结提示：apart from”除了还有“。6. in exchange for 变换； 互换 eg:he gave me a pen

13、 in exchange for my book .他用钢笔换我的书。nowadays yotl can return a used tv set in exchange for a new one. 现在你可以用旧电视机换新电视机了。用法拓展：exchange - for - m换 in exchange for交换，互换特别提醒：exchange-for 中 exchange 是动词；in exchange for 中 exchange 为名词。考题 6 （典型例题 分）-your watch looks nice,sister. can i exchange mywatch yours?

14、-you mean, you give me yours mine.a. with; in exchange with b. for; in exchange for c. in; exchange for d. for; exchange for考题6点拨：答案为 b。此题考查 exchange . 一 for . 一 “用换;in exchangefor “交换”。句意为：“姐姐，你的表真好看。我可以用我的表换你的吗？”“你的意思是你用你的表换我的。”总结提示录：记住exchange。-for和in exchange for 的搭配使用。三、重点句型7 .zheng he sent a m

15、essage to the king and to other african states, invitingthem to send ambassadors and open embassies in the new ming capital。 beijing 郑和向这位国王和其他非洲国家发出了邀请，请他们派使者来，并在明朝京城北京开设使馆。inviting引导现在分词短语用作状语，对前面部分起补充说明。eg :he pinned a/nessage on my door , readingcall me later , john.他在我家门上贴了一信息，上面写着：“晚些时候打电话给我，约

16、翰”。it rained nonstop for ten days, completely ruining our holiday . 大雨连续下了10天，完全破坏了我们的假期。at the end of 典型例题 re around 3 . 000 foreign printing eompanies in china,making up around 2 percent of national totai.到典型例题，000 家外国印刷厂，占全国总数的大约2%。特别提醒：此种现在分词的用法在近年的模拟题及高考题中频繁出现。是考查分词的一 个热点。应特别注意。考题 7 european fo

17、otball is played in 80 countries, it the most popular sport ,in the world.a. making b. makes c. made d. to make考题7点拨：答案为a。现在分词 making作状语，对前面的句子“european football is played in 80 countries 起补充说明的作用。句意为：欧洲足球80多个国家都踢，使它成为世界上最流行的运动。”总结提示。现在分词作状语，对前面的某一句子或某一单词起 补充说明作用。是前面句子所造成的后果，这种用法是命题的热点。 四、词语辨析8. loo

18、k up , refer tolook up 和refer to 都可作查阅讲，但 look up的宾语不能是dictionary .而应说 look up a word in the dictionary, 但可以说 refe rto the dictionary 。特别提醒：refer to与100k up所接的宾语不同.refer to 还有“谈到，涉及”之意。考题 8（典型例题）if you dont know what this loord means, the dictionary.a. look up b. refer to c. point to d. look out考题 8

19、 点拨：答案为 bo refer to the dictionary ,而 look up 不与 dictionary 连用。 句意为：“如果你不知道这单词什幺意思.请查阅字典。”总结提示：look up的宾语不能是dictionary ,而 refer to 的宾语是 dictionary .。m.语法归纳精通规则游刃有余本单元语法重点是句子成分一一谓语谓语的正确使用.主要涉及动词的时态与语态，现将动词的时态与语态的考查归纳如下：1. 一般现在时(1) 表示客观事实或普遍真理(不受时态限制)。eg ：the geography teacher told us the earth moves

20、around the sun 地理老师告诉我们地球围着太阳转。water boils at 100 c.水在100 c 时沸腾。(2) 表示现状、性质、状态时多用系动词或状态动词；表示经常或习惯性的动作.多用动 作动词.且常与表频率的时间状语连用。eg :we always care for each other and help each other. 我们总是互相关心。 互相帮助。ice feels cold .冰摸上去是冷的。(3) 表示知觉、态度、感情、某种抽象的关系或概念的词常用一般现在时：see、hear、smell、taste、feel 、notice、agree believe

21、、like、hate、want、think、belong、depend seem等。 eg：i know what you mean .我知道你的意思。(4) 在时间、条件状语从句中常用一般现在时代替将来时。但要注意由if引导的条件状语从句中可以用shall或will表“意愿，但不表示时态。eg :if you will accept myinvitationand come to our party , myfamily will be pleased .如果你愿意接受我的邀请并参加我们的舞会，我的家人会非常高兴。(5) 少数用于表示起止的动词如come go、leave、arrive、fl

22、y、return、start、begin、open、close、end、stop等常用一般现在时代替将来时，表示一个按规定、计划或安排要发 生的动作。当 be表示根据时间或事先安排，肯定会出现的状态，只用一般现在时。eg :the shop closes at 11: 00 p . m. every day .这个商店每天晚上11 点关门。 tomorrow iswednesday.明天是星期三。考题1(典型例题)-when will you come to see me, dad.?-i will go to see you when i the training course.a. wil

23、l have finished b. will finish c. are finishing d. finish2 . 一般过去时(1) 一般过去时的基本用法：表示过去的事情、动作或状态。常与表示过去具体的时间状语连用(或有上下文语境暗示)；用于表达过去的习惯；表示说话人原来没有料到、想到或希 望的事通常用过去时。eg :i met her in the street yesterday. 昨天我在街上遇至u她。i thought the film would be interesting. but it isnt .我原以为这电影会很有趣。但实-际不是。(2) 如果从句中有一个表示过去的时

24、问状语，尽管从句中的动作先于主句发生.但从句中的谓语动词仍用过去时。eg :he told me he heard an interesting story last night.他告诉我昨天晚上他听到了一个有趣的故事。(3) 表示两个紧接着发生的动作，常由以下词语连接.用一般过去时。but , and, when。as soon as 。 immediately , the moment, the minute 。 egthe moment she came in我在她身上发生了什么事。he bought a watch but lost(4)常用一般过去时的句型:why didnt you

25、/i think of that?,she told me what had happened to her|t_他买了一只手表但丢了。为何你/我没想到呢？ eg :.她一进来就告诉用心爱心专心-14 -.我忘记告诉你以i forgot to tell you 1 had been there with my brother before前我和我的兄弟去过那里。i didnt recogize him.我没认出他。3 . 一般将来时(1)表示未来的动作或状态。常用will/shall+ 动词原形(常与表示将来的时间状语连用如tomorrow next week 等)。 eg well have

26、 an exam in june(2)表示一种趋向或习惯动作。well die without air or water.六月份我们将有一次考试。eg :.没有空气或水，我们会死。(3)表示趋向行为的动词如将来时。coma go、start、begin、leave等词常用进行时的形式表示eg : the spring festival is coming . 春节快至u了。(4)be going to 与 will/shall , be to do , be about to do 用法及区别：be going to表示现在打算在最近或将来要做某事.这种打算往往经过事先考虑，甚至已经做了某种准

27、备；shall/will do表示未事先考虑过，即说话时临时作出的决定。be gomg to表将来.不能用在条件状语从句的主句中；而 will则能，表意愿。 egif it is fine, well go fishing .(正确)lf it is fine. we are going to go fishing.(错误)如果天气好.我们就去钓鱼。be to do sth .表按计划、安排即将发生的动作，还可表示吩咐、命令、禁止，可能性等。eg :.今天下午3点将会召开一次a meeting is to be held at 3 oclock this afternoon 会议。egbe a

28、bout to do sth .表示“即刻.就要”.后面不能接时间状语或状语从句。autumn harvest is about to start .秋收就要开始了。4 .现在进行时(1) 表示说话时正在发生着的动作；表示现阶段正在进行但不一定是发生在讲话时；表近期特定的安排或计划；go、come等起止动词可用进行时代替将来时。eg :he is teaching english and learning chinese.他在教英语同时在学汉语。we are leaving on friday .我们周五离开。the girl is always talking loud in public.

29、那个女孩总是在大庭广众之下大声喧哗。(现在进行时与always often等频度副词连用，表达某种感情色彩)(2) 下面四类动词不宜用现在进行时。(a)表示心理状态、情感的动词：like , love , hate ,care ,remember , believe , want, mind , wish . agree . mean, need 等。(b)表存在的状态的动 词：appear。 exist . lie , emain, seem, belong to, depend on 等。（c）表示瞬间性动作的动 词：allow , accept,permit , promise , ad

30、mit , complete 等。(d)表示感官的动词：see. hear,no tice 。 feel , smell , sound, taste . look 等。5.过去完成时(1)常用过去完成时的几种情况：(a) 在 by、by the end 、by the time 、until 、before、since 等后接表示过去某一时 间的短语或从句以前发生的动作。eg : by the end of last year , we had produced 20 ,000 cars .到去年年底，我们生产了两万辆车。the train had left before we reache

31、d the station.在我们至u达车站之前，火车已经开走了。(b) 表示曾实现的希望、打算、意图、诺言等。常用 had hoped/planned/meant/intended/thought/wanted/expected等或用上述动词过去式接不定式完成式表示即：hoped/p lanned +to have done。(c) “时间名词+before”在句子中作状语，谓语动词用过去完成时；“时间名词+ago在句中作状语.谓语动词用一般过去时。eg :he said his first teacher had died at least 10 years before.他说他的第位老师

32、至少在10年以前就死了。xiao hua left school 3 years ago.小华在 3 年前退学了。(d) 表示“一就的几个句型：hardly/no sooner/scarcely had+ 主语+过去分词+when/than/before+ 般过去时。eg :we had no sooner been seated than the bus started. =no sooner had we been seated than the bus started .我们一坐下.车就开了。(2) 在before或after引导的时间状语从句中用一般过去时态代替过去完成时。eg :af

33、ter he(had)left the room。the boss came in .他离开房间后，老板进来了。we arrived home before it snowed .在下雪之前我们就到家了。6 .过去将来时参照一般将来时对比：用would do、was/were going to do sth .表过去将来；comego、leave 等过去进行时表过去将来时；was/were to do sth .和 was/were about to do sth .表过去将来。7 .过去进行时(1) 过去某一时刻正在进行的动作或某一阶段内发生或频繁发生。(2) 某一动作发生时另一动作正在发生

34、。其中一个在由when或while引导的表示过去的时间状语从句中。8 .现在完成时(1) 现在完成时除可以和 for、since引导的状语连用外，还可以和下面的介词短语连用：during/in/over the last/past few years(months, weeks. days)、in recent years 等。(2) 下列句型中常用现在完成时：il is(has been)+一段时间 +since 从句this(that/lt)is the first(second )time that+ 完成时this(that/lt)is the only +that+ 完成时this(

35、this/it)is the best/finest/most interesting+that从句 + 完成时(3) 在时间或条件状语从句中.现在完成时可以代替一般将来时。eg :i shall post the letter as soon as i have finished it. 我一写完信， 就去寄。.等车停稳了，再下车。dont get off the bus until it has stopped9 .被动语态(1) 被动语态的构成方式：be+过去分词，口语中也有用 get/become+过去分词表示。(2) 被动语态的基本用法：不知道或没必要提到动作的执行者是谁时用被动语态

36、。强调或突出动作的承受者时常用被动语态(by短语有时可以省略)。(3) 使用被动语态时应注意的几个问题：(4) 主动变被动时双宾语的变化。eg :my friend gave me an interesting book on my birthday.=an interesting book was given to me(by my friend)on my birthday.=i was given an interesting book(by my friend)on my birthday.在我的生日聚会上，我的朋友送我一本有趣的书。(b)主动变被动时，宾补成主补(位置不变)；(作补语

37、的)不定式前需要加to。eg :the boss made him work all day long.=he was made to work ail day long(by the boss).那个老板强迫他工作一整天。(c) 短语动词变被动语态时，勿掉“尾巴”。eg :the children were taken good care of(by her).孩子们被(她)照顾得很好。your pronunciation and spelling should be paid attention to.你应该注意你的发音和拼写。(d) 情态动词和 be going to 、be to be

38、 sure to 、used to、have to、had better 等结 构变被动语态，只需将它们后面的动词原形变为be+过去分词。(e) 当句子的谓语为 say、 beiieve 、 expect 、 think 、 know、 write 、 consider 、 report 等时，被动语态有两种形式：一是谓语动词用被动语态，动词不定式作主补。二是用it作形式主语，真正的主语在后面用主语从句来表示。特别提醒：不能用被动语态的几种情况：所有的不及物动词或不及物动词词组不能用于被动语态之中。表示状态的谓语动词eg : last 、 hold benefit 、 contain 、 eq

39、ual、 fit 、join 、 meanlook like 、consist of 等。表示归属的动词 eg： have、own、belong to 等。表示“希望、意图”的动词 eg： wish、want、hope、like、iore、hate 等。宾语是反身代词或相互代词时谓语动词用主动语态，不能用被动语态。宾语是同源宾语，不定式、动名词等谓语动词不用被动语态。有些动词以其主语形式表示被动意义。特别是当主语是物时，常见的这类动词有sell、write、wash、open、lock 等。考题 2 (典型例题)-1 hear jane has gone to the ho-ly island

40、 for her holiday.-oh, how nice! do you know when shea. was leaving b. had left c. has left d. left考题 3 you have left the light on.-oh, so i have. and turn it off.d. im goingthere be- hind the door.a. i ll go b. ive gone c. i go 考题 4 -is this raincoat yours.? no, mined.hungher toy bear and believed s

41、hea. is hanging b. has hung c. hangs 考题 5 the little girl because she wasnt ever going to find it.a. had cried; lost b. cried; had lost c: has cried; has lost d. cried; has lost考题 6 (典型例题-you were out then i dropped in at your office. oh, i for a friend from england at the airport.a. was waiting b.

42、had waited c. am waiting d. have waited考题 7 i wonder why jenny to us recently. we should have heard from her by now.a. hasnt written b. doesnt write c. wont write d. hadnt written考题 8 hundreds of jobsif the factory closes.a. lose b. will be lost c. are lost d. will lose考题 9 the new suspension bridge

43、 by the end of last month.a. has been designed b. had been designed c. was designed d. would be designed考题1点拨；答案为 do在时间和务件状语从句中，用一般现在时代替将来时。句意为：“爸爸，你什么时候来看我？我一完成培训班就去看你。”考题2点拨：答案为 do根据jane has gone to . 一表示已经走了，所以 leave这个动 作已成为过去.故用一般过去时。句意为：“我听说简去holy岛度假了。嗅，太好了，你知道她什么时候走的吗？”考题3点拨：答案为 a从so i have可以看

44、出“现在就去关灯”表示将来的动作。句意 为：。你忘记关灯了。噢，确实是，我这就去关灯。”考题4点拨：答案为a。强调说话时“我的雨衣”的状态。句意为：。这是你的雨衣吗？一不是，我的正挂在门后。”考题5点拨：答案为b。丢失玩具发生在哭之前故用过去完成时。句意为：“这女弦哭了，因为她把玩具熊弄丢了，并且认为再也找不到了。”考题6点拨：答案为 a。从第一句话暗示出当我拜访你的时候，那时你在做什么。所以用 过去进行时。句意为：“当我去看你时，你出去了。噢.那时我正在机场等一位来自荚格 兰的朋友。”考题7点拨：答案为 a。从recently 可知此题时态用现在完成时。句意为：“我想知道 珍妮最近为何不给我

45、们写信？我们现在本应收到她的信了。”考题8点拨：答案为b。根据题意“如果工厂关闭，上千项工作会失去。”工作失去为被 动。故用被动结构。考题9点拨：答案为 b。从时间状语 by the end of iast month 判断出，应用过去完成 时，而主语b ridge与design为被动关系，故选b。句意为“这个新吊桥上月底就设计出了。”总结提示：正确理解各个时态的含义及其构成形式，同时记住它们各自的被动形式。iv.专题探究 由点及面 由表及里专题探究：听力技巧：就餐 (taking meals)专题详解：饮食与人们息息相关，就餐的话题必不可少。不论在餐馆就餐.还是在朋友家吃饭，大家都应注意使用

46、恰当的用语，表达清 楚自己的用意。其常用表达法：a table for two , piease .请找一张两人的桌子。can i have/take the table by the window?我能坐靠窗的桌子吗 ？this table is free/not taken.这张桌子没人。your tabies teady , sir .先生，您的桌位好了。can/may i take your order(now)？您现在点菜吗？考题 1 what did the man say about the coffee？a. he would like a cup of coffee.b. h

47、e seldom drinks coffee.c. he cant have a cup of coffee.（2）what would you like（to have）?您想要什么？would you like something。eat/drink）?你想（吃/喝）什么？and what to follow?/anything else?您还要点其他的吗 ？today , weve got /theres today.今天，我们有菜。todays special is今天的特价菜是（3）ld like/love/prefer （to have .一 ）我想要two eggs, pleas

48、e .两个鸡蛋。考题 2 where are the two .speakers?a. at a store. b. at a restaurant. c. at a grocers.考题1点拨；答案为 a。根据对话中男子所用的could really use间接表达了他想要喝的。考题2点拨：答案为b。根据舌中man所用的惯用语和 womans点的菜，汤来看，推断 出两人在饭店里。专题 1 听力原文： w what would you like to drink? m ： i could really use a cup of coffee .专题 2 听力原文： m： are you rea

49、dy to order , madame?w yes,川 have soup,; teak and a vegetable salad .总结提示：记住就餐时，人们习惯使用的表达方式，是做题的关键。v.考题类型一网打尽蓦然回首 灯火阑珊回顾 1 测试考点 2 （典型例题-）-how do you we go to beijing for our holidays?-i think wed better fly there. its much more comfortable.a. insist b. want c. suppose d. suggest1. d 点拨：考查suggest的用法，

50、从 wed better fly there 可知，对方询问的是建 议，且 we go to bening for our holidays一句中又省略 should ,若选b、c两项，从句应为 we will go to beijing ,故选 d。suggest 建议。后的 that 从句用（should）+ 动词 原形。回顾 2 测试语法（典型例题）when mark opened the door, he saw a womanstan.ding there. he her before.a. never saw b. had never seen c. never sees d. h

51、as never seen2. b点拨：从opened, saw等动词看出，动作发生在过去，而 see动词又发生在 open 之前，故用过去完成时态，表示“过去的过去”。句意为：当马克打开门，他看到一个妇女站在那儿，他以前从未见过她。回顾 3 测试语法（典型例题 she has set a new record, that is, the sales of her latest book 50 million.a. have reached b. has reached c. are reaching d. had reached3. a点拨：从she has set a new record

52、这个情景可以看出，销售额已经达到5千万”。需要用现在完成时态，而sales为名词复数形式。故选a。回顾 4测试语法（典型例题分）i you not to move my dictionary now i cant find it.a. asked b. ask c. was asking d. had asked4. a 点拨：根据 not 1 cant find it可以看出，说话的时间是现在。同时可以暗示出“以前曾告诉你不要动我的字典”这件事发现在now之前，应用一般过去时态。而 d项hadasked表示 “过去的过去”但是找不到过去的着眼点。故选a。回顾 5 测试语法 （典型例题分）te

53、lephone messages for the manager on her desk but she didnt notice therma. were left b. was left c. was leaving d. were leaving5. a点拨：从but she didnt notice them可判断出，leave动作发生在过去， 且telephone messages和leave之间存在着动宾关系，而messages是复数形式，故选 a。回顾 6 测试语法（典型例题 ecause that shop , all the t-shirts are sold at halt

54、 price.a. has closed down b. closed down c. is closing down d. had closed down6. c点拨：从 all the t-shirts are sold at half price,可判断出“商店快要关闭了”，而a项表示“已经关闭了“ 。is closing down“快要关闭了” ，用现在进行时，表示将来时态。回顾 7 测试语法 （典型例题）-has sam finished his homework today?-i have no idea. he it this morning.a. did b. has done

55、 c. was doing d. had done7. c点拨：题意：“萨姆今天完成作业了吗？不知道，今天早上他正在做作业”。c项wasdoing表示“那时正在做作业”，而其他三项与题意不符。回顾 8测试语法（ 典型例题分 ）lets keep to the point or we any decisions.a. will never reach b. have never reached c. never reach d. never reached8. a点拨：根据句式：祈使句 +or/and+陈述句：相当于一个if引导的条件状语从句。从 句用一般现在时，主语则用一般将来时，且根据题意：

56、“让我们不偏离这个主题，否则什么决定也不会达成，故选ao回顾 9 测试语法（典型例题分）my sister three times today but her line wasalways busy.a. ld phoned b. ive been phoning c. ive phoned d. i was phoning9. c点拨：从three times today看出，确实打过电话，但没打通，强调动作的完成。故 选c。回顾 10 测试考点 8 （ 典型仞题 the president spoke atthe business meeting for nearly an hour without his notes.a. bringing up b. referring to c. looking for d. trying on10. b点拨：考查动词短语辨析。根据题意：“这位总统在发言时