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| A．Should | B．Must | C．Could | D．Would |
About 60 percent of the students _____ from the south, the rest of them _____ from the north and foreign countries.
| A．are；is | B．is；are | C．are；are | D．is；is |
— Why did you put the wood near the fire? It’s dangerous.
— Don’t worry. Wet wood won’t _______.
| A．burnt | B．be burnt | C．be burning | D．burn |
— Thank you for joining in my birthday party.
— _______.
| A．It’s my duty | B．It’s right | C．It’s my pleasure | D．It’s nice to say so |
-------- Hey, look where you are going !
------- Oh, I’m terribly sorry. __________.
| A．I’m not noticing | B．I wasn’t noticing |
| C．I haven’t noticed | D．I don’t notice |
Robert is said _____ abroad, but I don’t know what country he studied in .
| A．to have studied | B．to study |
| C．to be studying | D．to have been studying |