It will be quite a long time ______she is back again,so don’t be too cross with her.
| A．that | B．since | C．before | D．until |
The overseas Chinese scientist made another wonderful discovery, ___________ of great value to study AIDS.
| A．which I think it is | B．which I think is | C．I think it is | D．I think is |
The situation is _________ --- we have no food, very little water and no medical supplies.
| A．desperate | B．adventurous | C．deserted | D．optimistic |
The long-lasting meeting __________ in disorder, __________ no conclusion.
| A．was ended; reached | B．ended; reaching | C．was ended; reaching | D．ended; to reach |
He is only too ready to help others, seldom, _________, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
— Would you have your family get together this New Year’s Day?
— ___________. We are busy working at that time.
| A．No way | B．Not at all | C．No problem | D．No chance |