We are often warned that smoking ______ great harm to our health.
| A．does | B．leaves | C．makes | D．gives |
It is late; ____, I'm too tired to go out.
| A．besides | B．except | C．except for | D．except that |
Mr Wang went to Nanjing ____ October,1998 and came back home ____ the morning of Nov.5.
| A．at;in | B．on;at | C．in;on | D．by;from |
We have produced 15% more cotton this year____ we did last year.
| A．as | B．than | C．like | D．white |
The teacher is busy ____ correcting papers.
| A．for | B．in | C．on | D．of |
____ the problem of method is solved, talking about the task is useless.
| A．Until | B．Since | C．After | D．Unless |