—Do you know where David is?
— Well, he _____ have gone far — his coat is still here.                   
A．shouldn’tB．can’tC．mustn’tD．wouldn’t
Ｂ
考查虛擬語氣表示推測。句意：—你知道David在哪里？—嗯！他不可能走遠的。他的上衣還在這里。Shouldn’t have done本不應該做某事，實際上做了；can’t have done不可能做某事；共計他的上衣還在這里，說明B正確。
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