7BUnit5Water主题阅读

1、7b unit 5 water 主题阅读aof all the things we eat and drink, water is the _1_ important. the human body can go _2_ food for a long time, but two _3_ three days without water could make people _4_.a lot of people dont understand how _5_ water the human body needs _6_ well and many people dont drink enoug

2、h, especially in _7_ weather. most people drink _8_ they are thirsty, but in fact they need more water, especially when they take _9_.a mans body is 65 to 75 percent of _10_. if we dont have enough water, we feel tired and may become ill.1. a. more b. most c. less d. least2. a. with b. on c. without

3、 d. by3. a. or b. and c. of d. but4. a. live b. exist c. last d. die5. a. many b. little c. few d. much6. a. work b. working c. to work d. works7. a. hot b. cold c. cool d. warm8. a. so b. that c. when d. since9. a. fun b. exercise c. time d. work10. a. blood b. water c. air d. food1-5 bcadd 6-10 ca

4、cbbbwater is very important to us. we cannot live without it. there is a lot of water on the earth, but we cannot use most of it. about 97.4% of the earths water is salty（咸的）. most of the fresh（淡的）water is snow and ice near the north and south poles（极）.we can use only about one percent of the water

5、on the earth. we use water from both lakes and rivers. some of the water evaporates（蒸发）and then becomes rain. of course we use rain water for farms and other things. we use this water again and again.sometimes the earths water is in the wrong place. there is a lot of rain in the tropics（热带地区）, but i

6、t is difficult to have farms in the tropics. most of the land there is not very rich. some desert land is rich, but there is only a little water in the desert.water is a problem for many people in the world.1. about _ of the earths water is fresh. a. 97.4% b. 2.6% c. 1% d. 25%2. most of the fresh wa

7、ter is _. a. snow and ice b. rain c. in lakes and rivers d. in oceans3. it rains after the water_from oceans, lakes and rivers. a. falls b. enjoys c. evaporates d. runs4. we only use_of the earths fresh water. a. 40% b. 97.4% c. 25% d. 2.6%5. most of the land in the tropics is_. a. poor b. dry c. ri

8、ch d. salty1、b 2、a 3、c 4、a 5、acwater is the “life” of our earth. it is in every living thing. it is in the air. it runs through mountains and valleys. it forms lakes and oceans. water is everywhere.nature has a great water system (系统). rainwater finds its way to streams (溪) and rivers. rivers lead t

9、o the ocean. at mouths of rivers, fresh water joins the salt water of the ocean.thick water steam in the air becomes clouds and clouds bring us rain. plant and animal's life depends on water. where there is water, there is life. we have to clean our streams and rivers and do something against po

10、llution because pollution does harm to the life. 1. we say water is the “life” of our earth because _.    a. water is in the air    b. water can run everywhere    c. there are living things in the water    d. where there is water, ther

11、e is life2. which of the following is exactly the same as what the article says?  3. according to (按照) the article, which of the following is correct?    a. water is in every living thing.    b. water is everything.    c. water forms everything.

12、    d. water runs through everything.4. according to the article, fresh water joins the salt water of the ocean _.    a. in the valleys    b. in the mountains    c. at mouths of rivers    d. at mouths of oceans5. what does th

13、is article say we have to do against pollution?    a. clean the steam.    b. stop air pollution.c. prevent the fresh water from joining the salt water.d. clean our streams and rivers. 1-5 daacdd drinking water is good for your health. there are some scientific ways of d

14、rinking water. 1. it is the best medicine to drink two glasses of water in the morning. 2. drink clean water. 3. drink the water that has not been boiled. many people think boiled water is safe and good to people's health. in fact, it is not true. the boiling point of water is 100. by boiling it

15、, most bacteria(细菌) in water can be killed. in the past, the water was less polluted, so boiling was a good way to make clean water. but heavy metals and other dangerous things in today's water are much more terrible than bacteria. boiling doesn't fix that problem. and boiling water may give

16、 us more of the dangerous things in our glass. 4. never use soft drinks to take the place of water. 5. water is also needed in winter. 6. drink water in the right time. 1) after getting up in the morning, you have less water in your body, because you weren't drinking for the whole night. so you

17、should drink some water to keep your health after getting up in the morning. that can prevent high blood pressure（血压）, cerebral hemorrhages (脑溢血), and so on. 2) drinking water at about 10 am helps your body keep enough water. 3) drinking water at about 3 pm can clean out the wastes in your body. 4)

18、about eight o'clock in the evening is the best time to drink water. your blood gets thicker when you sleep. water will make your blood less thick. besides, we should drink 2l of water every day. water is so important for our life. we should drink water often. 1. according to the passage, _ in th

19、e morning is the best _. a. drinking some hot soup, medicine b. drinking some porridge, breakfast c. drinking some water, medicine 2. _ can prevent high blood pressure, cerebral hemorrhages and so on. a. drinking some water after getting up in the morning b. drinking some water before going to bedc.

20、 drinking some milk before going to bed 3. at about 3 pm, drinking water can clean the _ in your body. a. oil b. food c. wastes 4. from the passage, we can see the best time to drink water is _.a. about eight o'clock in the morning b. about eight o'clock in the evening c. before supper 5. th

21、e best title (标题) to this passage is _. a. drink clean water b. don't drink the boiled water c. scientific water drinking 1-5 cacbcethe world's water shortagethe world is not only hungry, but it is also thirsty for water. this may seem strange to you, since nearly 70 percent of the earth'

22、;s surface is covered with water. but about 97 percent of this huge amount is sea water, or salt water. man can only drink and use the other 3 percent-the fresh water from rivers, lakes, underground, and other sources. and we cannot even use all of that, because some of it is in the form of icebergs

23、 and glaciers (冰川). even worse, some of it has been polluted.however, as things stand today, this small amount of fresh water is still enough for us. but our need for water is increasing rapidly - almost day by day. only if we take steps to deal with this problem now can we avoid(避免) a severe(严重的) w

24、orldwide water shortage later on.we all have to learn how to stop wasting our valuable water. one of the first steps is to develop ways of reusing it.today in most large cities, water is used only once and then sent out into a sewer system (下水道). from there it returns to the sea or runs into undergr

25、ound storage tanks. but it is possible to pipe used water to a purifying (净化) plant. there it can be treated with chemicals so that it can be used again, just as if it were fresh from a spring.but even if every large city purified and reused its water, we still would not have enough. all we'd ha

26、ve to do to make use of the vast reserves (贮备) of sea water in the world is to remove the salt.if we take these steps we'll be in no danger of drying up. 1. the world is thirsty for water because we can only use _ percent of the water covering the surface of the earth.a. 3 b. more than 3 c. less

27、 than 3 d. 972. which of the following statements is not true?a. as things remain unchanging, this small amount of fresh water is still enough for us.b. our need for water is becoming larger and larger.c. there will be no water shortage in the future.d. we should take steps to deal with the water sh

28、ortage problem.3. to reuse water, we should _. a. treat it with chemicalsb. use it only oncec. send it out into a sewer systemd. make it flow into underground tanks4. in order to have enough water, we should also make use of _.a. icebergs and glaciers b. sea water c. rivers and lakes d. underground

29、water5. in the passage, the writer tells us _.a. to make enough waterb. to pay more attention to the water shortage problemc. to pipe used water to a purifying plantd. to reuse the water1-5 ccabbfweather changes when the temperature and the amount of water in the atmosphere(大气) change. we can see an

30、d feel water coming from the atmosphere when we have rain. but the water must somehow get back to the atmosphere. meteorologists call this water cycle.there are many stages in the water cycle. rain falls when water vapor in clouds condenses(凝结). drops of water form and fall to the ground. the water

31、soaks into the ground and feeds streams and rivers. a lot of rain falls into the sea. the heat of the sun evaporates(蒸发) some of the water in the ground and in the rivers, lakes, and the sea. it changes the liquid water into water vapor. the vapor rises onto the air. water vapor is normally invisibl

32、e. on a very damp or humid(潮湿的) day, however, you can sometimes see water vapor rising from a puddle or in a mist above the water. water vapor also gets into the air from living things. trees and other plants take in water through their roots and give off water vapor from their leaves. people and la

33、nd animals drink water and breathe out water vapor. in all these ways the water returns to the air. these it gathers to form clouds and condenses to form rain. the rain falls to earth, and the cycle stars again. it continues even if snow or hail fall instead because both eventually melt to form water. the amount of water vapor in the air depends on the temperature. the air is moister in the tropics than in the cold polar regions.1. what is the main idea of the passage?a. water cycle b. water vapor c. how rain forms. d. rain is important2. how many ways of the water returning to the ai