As we all know, it’s not polite to keep others_________for a long time.A．waitB．
题型：不详难度：来源：
As we all know, it’s not polite to keep others_________for a long time.| A．wait | B．waited | C．to wait | D．waiting |
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答案
| D |
解析
| 这题考查非谓语的用法：keep sb doing“让某人一直做某事”，句意是：我们都知道，让别人等很长时间是不礼貌的。选D。 |
举一反三
It is time for class. Will you please get the blackboard__________?| A．to clean | B．cleaning | C．cleaned | D．having cleaned |
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__________from what everyone says about him, I would say he has a good chance of winning.| A．To judge | B．Judging | C．Judged | D．Having judged |
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Don’t bother me．I am listening to the birds ______．| A．singing | B．sing | C．to sing | D．sung |
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In college, Spring Break is usually associated with the beach, parties and sleepless nights,______ about relaxation and free time．| A．bring | B．brought | C．bringing | D．to bring |
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University of Cambridge, ______ in 1209, is home to a great number of outstanding figures．| A．found | B．founding | C．founded | D．to be founded |
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