单选题 But for the worker's help, we ______.

单选题 If you ever have the ______ to go abroad to work, you should take it.

单选题 His wife would rather that they ____ about the matter any more.

单选题 I could tell he was surprised from the ______ on his face.

单选题 The severe flood ____ damage to the people, had we not built so many reservoirs.

单选题 I have been out very often lately, and so would rather ___ at home this week.

单选题 I'd like to take ______ of this opportunity to thank you all for your cooperation.

单选题 Scientists think they have ______ in their attempt to find the causes of some major diseases.

单选题 Miss Brown didn't meet Mr. Black yesterday. If she had come here, she ____ him.