“Please don’t forget ______ the door when you leave.” “No, I won’t forget ______ it.”
| A．to lock; to lock | B．to lock; locking | C．locking; to lock | D．locking; locking |
The conference has been held to discuss the effects of tourism ______ the wildlife in the area.
| A．in | B．on | C．at | D．with |
.Wait till you are more ______. It’s better to be sure than sorry.
| A．inspired | B．satisfied | C．calm | D．certain |
.She will tell us why she feels so strongly that each of us has a role ______ in making the earth a better place to live.
| A．to have played | B．to play | C．to be played | D．to be playing |
.He suddenly saw what looked like a snake in the darkness. For an instant his heart seemed to stop ______.
| A．to beat | B．beating | C．beaten | D．being beaten |
I can think of many cases ______ students obviously knew a lot of English words and expressions but couldn't write a good essay.
| A．why | B．which | C．as | D．where |