He has made a wonderful discovery, ________ of great importance to science.
| A．which I think is | B．which do I think is | C．I think which is | D．which I think it is |
Internet, as well as the telephones, ________ an important part in our daily life.
| A．is playing | B．have played | C．are playing | D．play |
The value of life lies not in the length of days ，but in the use we ______ them.
| A．make | B．made of | C．made | D．make of |
Wang Hong is considered ___ one of the best students in our grade.
| A．being | B．to be | C．is | D．be |
--- Do you doubt ____ he’ll be fired by the school?
--- No, not a bit. But I doubt ____ he will bury himself into study.
| A．that; that | B．whether; / | C．if ; that | D．that; whether |
His brother met him at the Great Theatre yesterday afternoon, so he ____ have attended your lecture.
| A．couldn’t | B．needn’t | C．mustn’t | D．shouldn’t |