--How about the book you are reading?
--Good indeed. It ______many problems we have come across in our study.
| A．contains | B．covers | C．refers | D．concentrates |
Do come here on Monday,______ we, as planned, will take part in the gathering of AIDS prevention volunteers.
| A．then | B．and | C．therefore | D．or |
It's said that within five years cars will be a lot ____in our country.
| A．cheaper | B．cheapest | C．cheap | D．more cheap |
The driver was at ______ loss when ____word came that he was forbidden to drive after drinking alcohol.
| A．a; the | B．不填；不填 | C．the; the | D．a; 不填 |
This is _______ story I’ve told you about．Isn’t it _______ interesting one?
| A．the; the | B．a; an | C．the; an | D．an; the |
This is the first time that I _____ the summer palace．
| A．had visited | B．have visited |
| C．visit | D．visited |