【題目】If you _______ the book, you _______ buy it right now, I think.
A.needn't; needn't
B.don't need; don't need
C.don't need; needn't
D.don't need; needn't to

【答案】C
【解析】句意：如果你不需要這本書，我覺得現(xiàn)在你就沒有必要買它。needn't是情態(tài)動詞need的否定形式，后面跟動詞原形；don't need是實意動詞need的否定形式，后面跟to do sth.或者名詞做賓語，根據(jù)句意可知應(yīng)選C。

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