----Look,Mr.Hu is on the other side of the street.
----It____ be him.He has gone to Lanzhou.
A．mustn’tB．can’tC．wouldn’tD．couldn’t
B
考查情態(tài)動詞表示推測的用法，must表示推測是用于肯定句，can’t不可能做，would’t不愿意，coundn’t 不能，句意：--看，胡先生在街的另一邊，--不可能是他，他在南州呢。選B。
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