Don’t____________to tell us if you have a problem．We’re friends，aren’t we?
| A．worry | B．apologize | C．promise | D．hesitate |
----Shall we smoke here?
----No, we ______ , because the worker is filling our car with petrol..
| A．won’t | B．needn’t | C．couldn’t | D．mustn’t |
.Yang Liwei as well as the other two astronauts _______ to be the most qualified for space exploration.
| A．considered | B．had considered | C．was considered | D．were considered |
____ she looked after the old patient a whole year moves us all.
| A．What | B．That | C．Whether | D．If |
The question of _______ English will continue changing in the future is easy _______.
| A．if; to be answered | B．whether; to be answered |
| C．whether; to answer | D．If; to answer |
She looked around, but the tall man was nowhere______.
| A．to see | B．to be seeing | C．to be seen | D．seen |