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    题目列表(包括答案和解析)

    Snow in winter is harmless to crops in the fields．(反意疑问句)

    Snow in winter is harmless to crops in the fields, ________　________?

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    This is green food. It is _____ for our health.
    [     ]
    A. harmless
    B. bad
    C. harm
    D. harmful

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    选择并抄写单词

    Smoking is ________(harmful, harmless)to our health．

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    It’s _____for us to kill frogs because they are___.

    A. harmful, harmless　 B. harmless, harmful C. harmful, harmful D. harmless, harmless

    　　

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    选择并抄写单词

    We should take the ________(homeless; harmless)cat to the SPCA．

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