______ him to do like this, he wouldn’t have made such a serious mistake in his
writing.
| A．Did you persuade | B．Had you persuaded |
| C．If you should persuade | D．If you persuade |
Some animals carry seeds from one place to another, ______ plants can spread to new places.
| A．so | B．or |
| C．for | D．but |
The crazy fans___________ patiently for two hours, and they will wait till the movie star arrives.
| A．are waiting | B．had waited |
| C．have been waiting | D．will wait |
When ____ to danger and conflict, men tend to increase blood pressure, ____ nervous or anxious.
| A．exposed; felt | B．exposing; felt |
| C．exposed; feeling | D．exposing; feeling |
It is believed that _____ European scientist invented _______.
| A．an; a television | B．a; a television |
| C．an; the television | D．a; the television |
I don’t think David could have done such a stupid thing last night, ____?
| A．did he | B．didn’t he |
| C．do I | D．don’t I |