23. -These farmers have been to the United States.　 –Really? When ____ there?

　　　　 A. will they go　　 B. did they go　　 C. do they go　 　D. have they gone

22. The old man is quite weak after the accident, so he _______.

　 A. must take care of　 　B. must be take care of C. must look after　 D. must be looked after

21. What _______ the forest in our country in the last ten years.

　　　　 A. has happened to B. is happened to　　 C. has happened at　 D. is happening

20. When her father came back home, Joan _______ with her friend.

　　　　 A. talked　　　　　 B. talks　　　　　　 C. is talking　　　　 D. was talking

19. -Have you got the airplane tickets?

--No. when I _______ to the office, all the tickets to Beijing ______ out.

　 A. get; have been sold B. got; had been sold C. got; had sold D. got; were being sold

18. The woman _______ the child quickly and took him to hospital.

　　　　 A. put on　　　　　 B. dressed　　　　 C. had on　　　　　 D. was wearing

17. More and more people began to _______ that good health means good wealth.

　　　　 A. learn　　　　　　 B. understand　　　 C. consider　　　 D. realize

16. He could _______ neither French nor German. So I ______ with him in English.

A. speak; talked　　 B. talk; told　　　 C. say; spoke　　　 D. tell; talked

15. The window is broken. Try to _______ who broke it

　　　　 A. find out　　　 B. find　　　 C. look　　　 　　D. look for

14. It’s time for class. We’d better _______.

　　　　 A. stop to talk　　 B. to stop to talk　　 C. stop talking　　 D. to stop talking