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