4.---Must I finish the work to day?---Yes,but you ________finish it now.(  )
A.mustB.needC.need toD.don't have to

分析 --今天我必須完成這項(xiàng)工作嗎?
--是的,但是你不必現(xiàn)在就完成它.

解答 答案:D.
根據(jù)but you ________finish it now.可知這里應(yīng)該用否定形式,must的含義是必須一定,其否定形式mustn't表示禁止的含義.在這里不是禁止的意思.must的否定回答一般可借助于needn'和don't have to來構(gòu)成,表示不必.故選D.

點(diǎn)評(píng) 本題考查了情態(tài)動(dòng)詞的用法.注意must的用法以及它的肯否定形式.

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