The river smells terrible. People_______ dirty things into it .A．must stop to th
题型：不详难度：来源：
The river smells terrible. People_______ dirty things into it .| A．must stop to throw | B．must stop from throwing | | C．must be stopped to throw | D．must be stopped from throwing |
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答案
| D |
解析
试题分析：考查推测，must have done表示对对去事情的肯定推测，名词People和动词词组stop from是动宾关系，所以用被动式，句子意思“河水很难闻，人们一定是把脏东西仍在河水里”,所以选D
点评：推测是个难点，must have done表示对对去事情的肯定推测；may have done表示对过去事情的不可定推测 |
举一反三
------ May I smoke here?
------ If you____, that"s the smoking section over there.| A．should | B．could | C．may | D．must |
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Tom hasn’t come to work since last Friday. he have had an accident?| A．Must | B．Could | C．Should | D．Might |
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You _________to the meeting yesterday. What was the reason for your absence? | A．had come | B．came | C．would have come | D．should have come |
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I didn’t know Headmaster Weng was away for Beijing. I to his office yesterday.| A．mustn’t have gone | B．needn’t have gone | | C．wouldn’t have gone | D．couldn’t have gone |
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| Sir, a Mr. Wang is waiting for you at the gate. ________ he come in or stay there? |
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