Great as Newton was, many of his ideas_____today and are being modified by the work of scientists of our time.
| A．are to challenge | B．have challenged |
| C．are challenging | D．have been challenged |
Since you have such good preparations, there ____ be any problem about passing the coming job interview.
| A．mustn’t | B．shan;t | C．shouldn’t | D．needn’t |
We _____ finish it ahead of time, though it was such a tough task.
A. could B. would C. were able to C. ought to
----Was he present a the meeting?
---- He ____ not have attended it, for he was busy repairing his computer all the time.
| A．can | B．might | C．must | D．should |
---- Isn’t amazing that such a good player ____ have failed to be elected to compete?
----Yes, but that is life.
| A．would | B．might | C．must | D．should |
According to the recent report made by the government, the number of visitors who have traveled to the earthquake-hit areas like Wenchuan in Sichuan has ______20,0000, ________to promoting their awareness of the disaster in hisrory.
| A．reach; contribute | B．reached; contributed | C．got; contributing | D．reached; contributing |