I will certainly be surprised if he ______ to tell them what he knows.

A. dare     B. will dare     C. dared    D. dares

. It is ______ for anyone to choose good friends.

A. the most important  B. too important thing C. a most important  D. most important

. ______ was done by the girl students.

A. One three of the work   B. One third of the works

C. Two third of the works   D. Two thirds of the work

Mary: This handbag isn't yours, is it?

Joan: __________.

A. Yes, it's not mine   B. No, yours is bigger

C. Yes, it's my friend's   D. No, mine is a red one 

——I must apologize for _______ ahead of time.——That's all right.

A. letting you not know   B. not letting you know.

C. letting you know not   D. letting not you know

Do you mind ______ how you succeed?

A. if I go and see B. if I go seeing C. my going and see D. my go to see

——How much is it ______?            ——$ 20, I think.

A. spent   B. cost       C. worth    D. taken

Reading without stop is a ______ piece of work.

A. tire   B. tired    C. tiresome  D. troubled

The mother ________ her son's success in the newspaper.

A. learned about B. learned   C. heard   D. learned from

.None of us know what happened ________ him ________ the evening of November 12.

A. for; in           B . with; on            C. to; on               D. to; in