(A)用括号内所给单词的正确形式填空，完成下列各句。

41. A (rob)happened to the bank on a cold winter morning.

15. I don”t know .

A. what the population of Tianjin is

B. what is the population of Tianjin

C. how much the population in Tianjin is

D. how much is the population in Tianjin

14. Though she is a slow learner, she has her classmates after a year”s hard work.

A. fed up with B. caught up with C. come up with D. got on well with

13. My parents Shanghai for seven years.

A. have been B. have gone to C. have been in D. have been to

12. Whose turn on duty today?

A. is B. will be C. it will be D. is it to be

11. These books must not out of the reading-room.

A. taken B. be taking C. be taken D. take