The thief ran away at the _____ of a policeman.
| A．sight | B．screen | C．sound | D．seeing |
Mr. Li arrived at the Wuguang train station twenty minutes ago, but the train to Guangzhou ____________ yet.
| A．hadn’t come | B．won’t come | C．hasn’t come | D．didn’t come |
To pass the driving test, Alice had a busy month __________ driving the car.
| A．to practise | B．practising | C．practised | D．practice |
We do have the most supportive parents and teachers, ________will make a difference to our study, unless all of us make every effort .
| A．none of them | B．all of them |
| C．none of whom | D．all of whom |
Only when __________ senior high school __________ to show a great interest in poems.
| A．did I enter; did I begin | B．did I enter; I began |
| C．I entered; I began | D．I entered; did I begin |
---Why are you still here? Everybody has gone to attend the lecture by the president.
--Oh, I ___________ about it!
| A．wasn’t informed | B．hadn’t been informed |
| C．haven’t informed | D．didn’t inform |