AIDS is said ______ the biggest health challenge to both men and women in that area over the past few years.
| A．that it is | B．to be | C．that it has been | D．to have been |
Most of my friends will go hiking next Sunday. The rest ______ to see a new film.
| A．has | B．have | C．are | D．is |
一I enjoyed a very good holiday in Shuangqiao. 
－__________.
| A．I am glad to hear that | B．It’s my pleasure |
| C．Congratulations | D．That’s very nice of you |
My new shirt doesn’t fit me well, so I’ll take it back to the store______sold it.
| A．where | B．when | C．that | D．in which |
. — You must obey every word of mine!
— _____ I don’t?
| A．How if | B．What if | C．Even if | D．Only if |
16. The river,______the bank are covered with trees, is very long.
| A．whose | B．which | C．of which | D．which of |