------ Who is that man over there? _______ it be our teacher?
------ No, it _______ not be our teacher. It _______ be Mr. Zhang.
A．can ; can; mustB．must; must; can
C．can; must; mustD．can; must; can
A
考查情態(tài)動(dòng)詞�！澳沁吥莻�(gè)人是誰(shuí)？有可能是我們的老師嗎？”“不，不可能是我們的老師。他一定是張老師�！眂an表示肯定推測(cè)，意為“可能”，常用于否定句和疑問(wèn)句；can’t“不可能”；must表示肯定的推測(cè)，意為“一定”。故選A。
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