How long do you believe it will be _____ Chinese people land on the moon?
| A．before | B．since | C．when | D．that |
Pollution is ______bad ______many rivers are full of chemicals and kill sea creatures.
| A．so ; that | B．such ; that | C．too ; and that | D．quite ;which |
Rather than _______in the city, the old man would prefer______in the countryside.
| A．stay; living | B．to stay; to live | C．stay ;to live | D．to stay ; living[ |
Some audience(观众)_______that it usually takes too long to watch the ads during the TV series .
| A．explain | B．complain | C．claim | D．stand |
The football match will be put off ,if it______.
| A．will rain | B．rains | C．rained | D．is raining |
He decided not to attend her birthday party ______ he had been invited..
| A．even if | B．because | C．as if | D．as though |