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    【题目】Daily homework is necessary, __________ too much homework may bring harm to students.

    A. soB. butC. forD. or

    【答案】B

    【解析】

    句意：每天做作业是必要的，但作业太多会对学生造成伤害。

    A. so因此；B. but但是；C. for为了；D. or或者。根据Daily homework is necessary每天做作业是必要的，可知，这是说作业的好处。与后面的句子__________ too much homework may bring harm to students. 这是说作业的坏处，前后事实相反，因此应该用转折连词but。故选B。

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