--Listen! Someone is knocking at the door.
-- ______ be Mary. She has just been to Beijing
| A．She mustn’t | B．It can’t | C．It must | D．She may |
Next door to ours _________, who seem to have settled into life in China.
| A．where live a foreign couple |
| B．where do live a foreign couple |
| C．live a foreign couple |
| D．do a foreign couple live |
You’d better not call the manager between 7 and 8 this evening, for he ________ an important meeting then.
| A．will be having | B．would have |
| C．will have | D．will have had |
— Have you read the novel?
— Yes. I ________ it three times while I was in university.
| A．had read | B．read |
| C．have read | D．was reading |
Every means _________, but none proved __________.
| A．have tried; a success |
| B．have been tried; successful |
| C．has tried; to be successful |
| D．has been tried; successful |
The time and effort he has devoted during the past few years________ trees in that remote area is now considered to be of great value．
| A．to plant | B．to planting | C．plant | D．planting |