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 Weknowthatasmileisusuallyasign

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問題詳情:

 Weknowthatasmileisusuallyasign

 We know that a smile is usually a sign _____ people feel friendly and happy, but _____ we don’t know who the new person is?

   A. that; what if         B. when; what         C. when; how about   D. if; how

【回答】

A

知識點:連詞

題型:選擇題

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