In the meeting, the professor expressed his thanks for the aid he _________ from his students.
| A．received | B．was received | C．have received | D．had received |
In a room above the store, where a party _____, some workers were busily setting the table.
| A．has been held | B．was to be held |
| C．will be held | D．is being held |
Most people think that it is _____ to spend some time surfing the Internet, but we shouldn’t be too dependent on it.
| A．worth | B．worthwhile | C．worth of | D．worthy of |
--- Have you handed in your schoolwork yet?
---Yes, I have.I guess it _____ now.
| A．has graded | B．is graded |
| C．is being graded | D．is grading |
We _____ have bought so much food now that Suzie won’t be with us for dinner.
| A．needn’t | B．mustn’t | C．can’t | D．should |
By the time you wake up tomorrow morning, we _____ in the USA.
A.arriveB.arrived
C.are arriving D.will have arrived