题目内容

—Look! The man at the gate        be our headmaster. He stands there every morning.
—No, it        be him. He is holding a meeting in the office now.
A．must； can’tB．must; canC．can’t; mustn’tD．can’ t; must
A
考查情态动词表推测的用法。must表推测用于肯定句中,can表推测用于疑问或否定句中。根据题意应选A。
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