Part two: language Knowledge 
Section A (15 points)Directions: Beneath each of the following sentences there are 4 choices marked A, B, C and D. Choose the one answer that best completes the sentence.
21. --- Time passes quickly, doesn’t it?
--- Yes. It will be only two months_______we take the 2010 College Entrance Examination.
A．since B．after C．before D．When
.
—Sorry to hurt you.
—_______. You didn’t mean to, did you?
| A．Forget it | B．No problem | C．All right | D．Don’t say so. |
.
Tom joined a dancing group but didn’t seem to , so he left.
| A．show off | B．go up | C．fit in | D．come over |
.
Your brother__________be hungry now.-----he had lunch only two hours ago!
| A．wouldn’t | B．can’t | C．mustn’t | D．needn’t |
.
AIDS is said________the biggest health to people in that area over the past few years.
| A．that is | B．to be | C．that it has been | D．to have been |
.
With a lot of problems ________, the newly – elected headmaster is having a hard time.
| A．settled | B．settling | C．to settle | D．being settled |