---- An ant has two stomachs --- one for itself and the other for others.
----Really? Quite interesting. I ________ anything about it.
| A．don’t know | B．hadn’t known | C．haven’t known | D．didn’t know |
We’ll never forget the days ______ we lived in the country.
| A．when | B．where | C．which | D．不填 |
I am sorry I didn’t hear you clearly. _____you repeat it please?
| A．Could | B．Must | C．May | D．Need |
—I regret____ to tell ____you that John has been fired.
—I can hardly believe my ears. He is such a fine worker.
| A．telling | B．having told | C．to tell | D．to have told |
He failed the mid-term examination and only then________how much time he had wasted.
| A．he realized | B．did he realize |
| C．he had realized | D．had he realized |
There are 30 people________in the traffic accident but the injured ________ rescued at once.
| A．injuring; were | B．injuring; was |
| C．injured; was | D．injured; were |