------- Jack, you erase the blackboard today, __________?
------- But I did it yesterday.
| A．will you | B．do you | C．would you | D．don’t you |
Only when ____in the afternoon _____able to leave.
| A．the match was over; they were | B．was the match over; were they |
| C．was the match over; they were | D．the match was over; were they |
---- I usually take a walk at night.
---- ___ do that.
| A．Better not | B．You'd better not to | C．You hadn't better | D．Best not to |
Look at the trouble I am in! If only I ____your advice．
| A．followed | B．would follow | C．had followed | D．should follow |
On the closet _____ a pair of trousers his parents bought for his birthday.
| A．lying | B．lies | C．lie | D．is laid |
Professor Smith, along with his assistants, __ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |