人教版必修4 unit 2 workbook练习

1、First column : circulate circulation confuseconfusiondiscoverdiscoveryequipequipmentexpandexpansionproduceproduction Using words and expressionsSecond column :battle battleexportexportfocusfocusregretregretstrugglestrugglesumsumAnswer key for exercise 1 on page 491. The news about Jeffs success quic

2、kly _ around the school.2. The _ of his study was on the _ of Chinese products.3. In an interview, Jeff _ that he had only one _ .4. Before, he often _ to understand the _ world of business.5. He was studying English to _ himself for his new job.circulatedfocusexportcommentedregretstruggledconfusing

3、equipToday we use _ in almost every part of our lives, hoping to make life faster, more convenient or just better. At home we use them to kill flies and other disease- carrying _. Doctors give them to us in medicine to fight harmful _ in our bodies. Factory workers use them in industrial _ to make e

4、verything from toys to shoes to toothbrushes. Farmers also use them in the _ to help their plants grow fast and become strong. chemicalspetsbacteriaproductionsoilAnswer key for exercise 2 on page 49However, the _ of new ways to use _ have brought difficulties as well as benefits. For example, too mu

5、ch use in farming leads to food that is low in _ and other things that we need for good _. What is the _ of the problem? Some people think it is from a wrong _ on money and speed, while others say it is just from a lack of education about the problems. Who knows? Maybe it is both.discoverieschemical

6、smineralsfocusrootnutrition1.今天的课主要讲如何写新闻总结。今天的课主要讲如何写新闻总结。(focus on ; summary )2.我们必须快速浏览这个报告我们必须快速浏览这个报告, 找到它的主要内找到它的主要内容容 (skim)Todays lesson focus on how to write a summary of a new article.we must skim the report to find the main idea.Answer key for exercise 3 on page 493.老师让我们将难懂的单词划线并查字典（找出其意

7、思）。(underline)4.他说像统计数据这样的细节就不必包括在内了。(statistics; details )The teacher told us to underline the difficult words and look them up in the dictionary.He said that details like statistics should not be included. 5.我想我将用到一篇关于农民们让自己的土地远离化肥的报告。(keepfree of ; chemical fertilizers)6.这个农民花了20年的时间来创建自己的企业。(bui

8、ld up )7.使用过多的化肥导致了严重的问题。(lead to )I think Im going to use a reporter about how farmers are keeping their fields free of chemical fertilizers.It took the farmer twenty years to build up his business .Using too much chemical fertilizer will lead to serious problems .Using structures1 Smoking 2 paying 3 getting 4 Learning 5 playi