A．becauseB．sinceC．whenD．for

A．becauseB．sinceC．whenD．for

回答（55）题 查看材料A.becauseB.sinceC.because ofD.by re

材料题请点击右侧查看材料问题 查看材料A.becauseB.for the

【C18】A．becauseB．whileC．whenD．if

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He must have heard the bad news, he looks upset.A、becauseB、forC、whenD、as