—I wonder why Mr Green hasn't showed up at the meeting yet.
—I'm not sure，but he________in a traffic jam driving here.
| A．could be stuck | B．might have been stuck |
| C．might be stuck | D．must have been stuck |
I prefer ________ the movies rather than ________ home.
| A．go to; stay | B．to go to; stay |
| C．going to; staying | D．to go to; staying |
In our class there are 73 students, ____ half wear glasses.
| A．in whom | B．of them |
| C．in them | D．of whom |
It’s uncertain ____ the fashion show will be held next week.
| A．what | B．why |
| C．whether | D．that |
Some policemen were sent there to ________ the villagers ________ the trees.
| A．keep; cutting down | B．prevent; cutting down |
| C．prevent; to cut up | D．stop; to cut up |
______ the kids have left home , we’ve got a lot of extra space.
| A．Even if | B．Now that |
| C．In case | D．As though |