Though many of the heavy smokers have realized the serious effect that smoking has ______ their health, they continue to smoke instead of ______.
| A．for; giving it up | B．on; quitting | C．to; abandoning | D．on; leaving |
--- I’m afraid I can’t return the book to you before Friday.
---_______.
| A．Don’t be afraid | B．Be careful |
| C．Forget it | D．Take your time |
They are so busy that they have no time to do any sports, ______they need to do so.
| A．wherever | B．whenever | C．even if | D．as if |
I don't know _______.
| A．how can I finish my homework on time |
| B．how I could finish my homework on time |
| C．I can how finish my homework on time |
| D．how I can finish my homework on time |
Hurry up! The train ______. You know it ______ at 8:30 am.
| A．leaves; leaves | B．is leaving; leaves |
| C．leaves; is leaving | D．is leaving; is leaving |
The head teacher insisted that every minute ______ made full use of ______ for the mid-exam.
| A．be; to prepare | B．was; preparing |
| C．be; preparing | D．was; to prepare |