23. Mr. Smiths was busy writing a story, only ______ once in a while to smoke a cigarette.
| A．to stop | B．to have stopped | C．being stopped | D．stopping |
相关试题
It is reported that a car went out of______ control on a high way______ north of Tangshan and three people got killed．
| A．the; the | B．不填; the | C．the; 不填 | D．不填; 不填 |
We ______ last night, but we went to the concert instead．
| A．must have studied | B．might study |
| C．should have studied | D．would study |
In no way ______leave ______ little children alone．
| A．we must; so | B．must we; such | C．must we; so | D．we must; such |
. Sarah hopes to become a friend of ______ shares her interests.
| A．anyone | B．whomever | C．whoever | D．no matter who |
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