These trees must have been planted three years ago, _____?
| A．mustn’t they | B．weren’t they |
| C．didn’t they | D．haven’t they |
The manager suggested an earlier date ____________ the meeting.
| A．on | B．for | C．about | D．with |
The Chinese are good at table tennis ___________the English are interested in football.
| A．if | B．as | C．while | D．since |
Some pre-school children go to a day care center, __________ they learn simple games and songs.
| A．then | B．there | C．while | D．where |
Some doctors were sent to the front where medical workers were __________.
A. in great need B in desperate need of C needed great D needed in
---Have you heard the latest news?
---No, What __________?
| A．is it | B．is there | C．are they | D．are those |