The workers agreed to ________ the strike if the company would satisfy their demands.
| A．call for | B．call in | C．call off | D．call up |
We ____ that the magazines you have borrowed be returned to the school library before the end of this month．
| A．hoped | B．permitted | C．wished | D．required |
Look! Tom is too sleepy to work．He _______ up watching TV．
| A．mustn’t have stayed | B．shouldn’t have stayed |
| C．mustn’t stay | D．ought not to say． |
Hardly ______ he got out of the court ______ the reporters raised a lot of questions to him．
| A．had … when | B．had…than | C．did…when | D．has…than |
Perhaps the day will come ____ people will be able to breathe clean air in cities．
| A．when | B．while | C．as | D．since |
Modern forms of transportation and communication have done much to ______ the isolation（隔离）of life in Alaska．
| A．break down | B．break out | C．break into | D．break through |