1. Dozens of scientific groups all over the world have been_________ the goal of a practical and economical way to use sunlight to split water molecules.
      A. pursuing                           B. chasing
      C. reaching                           D. winning

2. Dr. Smith failed many times but he finally _________to find a successful way to solve the problem.
      A. broke off                          B. broke down
      C. broke out                          D. broke through

3. Daring the ________ larrups took all the troubles to irrigate their crops.
     A, draught                         B. naught
     C. fraught                         D. drought

4. During the business depression half the machines in this factory were ________
     A. helpless                           B. vacant
     C. idle                               D. lonely

5. During the nineteen years of his career, France Battista has won the __________of a wide audience outside Italy.
     A. enjoyment                            B. appreciation
     C. evaluation                           D. reputation

6. During the trip Tom and I _________ driving the car. He would drive for about two hundred miles and then 1 would drive for about another hundred miles.
     A. took effect                            B. took turns
     C. made efforts                          D. turned over

7. Education is carried out __________the principles of the school.
     A. to keep pace with                  B. in relation to
     C. according to                          D. in favor of

8. Employers expect their employees to be ________ for work.
     A. timely                                B. punctual
     C. prompt                                D. urgent

9. England, Scotland and Wales ________ the island of Great Britain.
       A. consist                            B. compose
       C. make                              D. combine

10. English has become a communication ________ for people from different countries.
       A. medium                              B. merit
       C. stream                              D. enjoyment

1. [答案] A
    [翻译] 世界上计多科学实验团体，一直在寻求利有阳光来分解水分子的切合实际又说济的方法。
    [分析] pursue的意思是“寻求，从事，继续”；chase的意思是“追逐，追求”；reach的意思是“到达，达到”；win的意思是“赢得，获胜”。    

2. [答案] D
    [翻译] Smith博士失败了很多次，但是最终他成功地找到了解决这个问题的办法。
    [分析] break through的意思是“突破；克服；掐脱出来”；break off 的意思是“突然停止，中断”；break down 的意思是“（机器等）出故障；中断；分解”；break out的意思是“爆发，突然发生”。 

3. [答案] D
    [翻译] 在干旱期间农民们想尽一切办法来灌溉庄稼。
    [分析] drought的意思是“旱灾，干旱”；draught的拼写形式和drought非常相似，但是      draught的意思是“风、气流”；naught的意思是“无”；fraught的意思是“充满了”。能作表语。

4. [答案] C
    [翻译] 在工商业不景气时候，这所工厂里的机器有半数是停顿的。
    [分析] idle的意思是“闲散，懒惰”；helpless的意思是“无助的，无依靠的”；vacant的意思是“（房间、座位等）空着的，未被占用的”；lonely的意思是“孤独的，寂寞的”。

5. [答案] B
    [翻译] 在他19年的职业生涯中，France Battiate 赢得了意大利以外的广大观众的广泛赞赏。
    [分析] appreciation的意思是“欣赏，赞赏”；enjoyment的意思是“享受欢乐”；    evaluation的意思是“估计，评价”；reputation的意思是“名誉，声望”。

6. [答案] B
    [翻译] 旅行中，Tom和我轮换着开车，他开两百英里后，我再开一百英里。
    [分析] take turns的意思是“依次，轮流”；take effect的意思是“生效，起作用”；make      efforts的意思是“做出努力”；turn over的意思是“打翻，反复考虑”。

7. [答案] C
    [翻译] 教育工人必须按照学校的原则来进行。
    [分析] according to的意思是“按照，根据”；to keep pace with的意思是“与……齐步前进”；in relation to的“关于，考虑到”；in favor of的意思是“赞成，支持”。   

8. [答案] B
    [翻译] 雇主们都期望他们的雇员能准时上班。
    [分析] punctual的意思是“守时的，准时的”；timely以ly结尾的，但它是一个形容词，意思是“及时的，正好的”；prompt的意思是“迅速的，敏捷的”；urgent的意思是“急迫的，紧要的”。 

9. [答案] B
    [翻译] 大不列颠岛由英格兰、苏格兰和威尔士构成。
    [分析] compose是一个及物动词，意思是“组成，构成”。它常用在be composed of 的结构中，意思是“由……构成”；consist