Houston Rockets, ______ led by as many as 10 points in the first half, has dropped three straight after winning eight matches.
| A．which | B．that | C．it | D．when |
Ancient Greeks were responsible for many of the _______ in science and other fields．
| A．advances | B．progress |
| C．development | D．civilization |
一When shall we start the restoration of the historic buildings?
一Not until our plan________ by the committee．
| A．will be approved | B．approves |
| C．is to approve | D．has been approved |
—Two hundred of the tourists were saved from danger in Taiwan, but the rest ______ still missing．
— If only the travel agency ________ more measures to prevent such accidents．
| A．is; has taken | B．are; had taken |
| C．is; took | D．are; would take |
— No one can answer the question _______ we can complete the task in time, do you know?
— Yes, and this is because we don’t know the way _______ the scientist used last time．
| A．whether; which | B．if; which |
| C．whether; in which | D．if; in which |
— ____ visited the Shanghai World Expo is sure to tell you the place is worthy ____ twice．
— You can say that again．
| A．Those who have; visiting | B．Whoever has; visiting |
| C．Those who have; to be visited | D．Whoever has; to be visited |