―Do you know where David is? I couldn’t find him anywhere.
―Well. He ______ have gone far — his coat’s still here.
A．needn’tB．can’tC．mustn’tD．wouldn’t
B

試題分析：考查表示推測的情態(tài)動(dòng)詞用法：句意：--你知道戴維在哪里？我到處都找不到他。---喔，他不可能走遠(yuǎn)--他大衣還在這兒呢。表示否定推測用can’t have done，過去不可能做了…，needn't have done sth. 表示“本不必做某事”（實(shí)際上做了），mustn't 表示“禁止”，不能用于推測句。wouldn't have done sth. 用于虛擬語氣，表示“如果。。的話，就不會(huì)做了某件事情），選B
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