I was watching the news on TV ________ the power went off.
| A．when | B．as | C．while | D．until ． |
At present,_____ number of students are near-sighted and, what’s worse, _____number of them is increasing.
| A．a; the | B．a; a | C．the; the | D．the; a |
--I think Nelson Mandela is a great man. Do you think so?
--______ I feel that he is a true hero, too.
| A．I’m with you. | B．I don’t think so. | C．Pardon? | D．Really? |
______, but he insisted that he _____ to school ．
| A．Though he was ill , went | B．He was ill, go |
| C．Having been ill, should go | D．Having been ill , went |
—Tom has won the 100-meter race.
—__________! He never won it before.
| A．Congratulations | B．What good news |
| C．What a good surprise | D．How exciting the race is |
A brilliant idea occurred to him, ______ to his research in the lab．
| A．while devoting | B．while devoting himself |
| C．while he was devoted | D．while devoted |