Chances are high ________ China and Russia will make an agreement to build an oil pipeline.
| A．when |
| B．where |
| C．that |
| D．which |
I have no doubt ______ she will come out first in the English contest.
| A．if | B．about | C．whether | D．that |
Her teacher helped her so much that she bought him a beautiful pen _________.
| A．by turns | B．in return | C．in answer | D．in turn |
His disappearance(失踪)______ by the police.
| A．looked at | B．will be looked in | C．is being looked into | D．has been looked up |
The government tried ____ they could ____ the people in Yushu
| A．all; help | B．what; to help | C．that; help | D．that; to help |
Former IOC (the International Olympic Committee) president Samaranch’s death is believed ____ by heart attack.
| A．causing | B．being caused | C．to be caused | D．to have caused |