Listen! His family must be quarreling, _____?
A．mustn’t it.B．isn’t it. C．a(chǎn)ren’t they.D．needn’t they.
C
：
試題分析：must表肯定推測，“一定”，對現(xiàn)在推測，family指家人。句意：聽！他的家人一定正在爭吵，是嗎？
點(diǎn)評：做本題的關(guān)鍵在于要掌握帶有情態(tài)動(dòng)詞的反義疑問句要用情態(tài)動(dòng)詞后的動(dòng)詞來反問，另外要根據(jù)句意判斷主謂一致。如family指家人而不是家庭。
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