31. None of them knew about the plan because it ________ a secret.

   A. kept     B. keeps        C. is kept       D. was kept

30. Tom, together with his parents, often ________ some cleaning in their house on Sundays.

 A. do     B. does       C. is       D. are

29. It’s _________ nice of you to help me.

 A. true       B. truly       C. real            D. really

28. ―Help me with my math next year please.

―I ___________.

   A. will      B. must      C. should       D. can

27. The girl isn’t old enough to _________ herself.

   A. put on       B. wear        C. have on         D. dress

26. ―Have you finished your report yet?

―No, I’ll finish it in ________ ten minutes.

   A. another      B. other         C. more       D. less

25. I’m not sure ________ he will come here. ________ he comes here, please let me know.

   A. that, When      B. that, If         C. if, Whether       D. whether, When

24. ―Look! The man at the gate ________ be our headmaster.

―No, it _________ be him. He is holding a meeting in the office.

   A. must, can’t     B. must, mustn’t    C. can, can’t     D. can, mustn’t

23. ―Have you seen ________ pen? I left it here this morning.

―Is it _________ black one? I think I saw it somewhere.

A. a, the       B. the, the      C. the, a       D. a, a

22. ―We spent all our money because we stayed at the most expensive hotel in town.

―Why didn’t you stay at ________ one?  

   A. a cheap      B. a cheaper         C. the cheap      D. the cheaper