15. Let’s keep to the point or we ___________ any decisions．

A． will never reach　 B. have never reached C. never reach　 D．never reached

14. In the Great Depression, the American government couldn’t find good solutions _____ the unemployment problem

A. of　　 B. to　　 C. on　　 D. about

13. In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.

A. it marked　　 B. marking　 C. marked　　　 D. to mark

12. I spent five hours_____________ the book__________ I paid 10 dollars.

A. reading; that　 B. to read; for that　 C. read; which　　 D. reading; for which

11. With five hungry children seated round the table, the food disappeared_____________.

A. on time　　　　 B. in time　　 C. at no time　　 D. in no time

10. -You haven’t been to Beijing, have you?

　 -______________. How I wish to go there!

A. Yes, I have　 B. Yes, I haven’t　　 C. No, I have　　 D. No, I haven’t

9. - I have just had my watch repaired.

-How much did they ______ you?

A. pay　　　　 B. charge　 C. cost　　　　　 D. spend