题目内容
【题目】Chen Wei isn't at school today________ he is taking part in a robot competition in Shanghai.
A.afterB.becauseC.beforeD.if
【答案】B
【解析】
略
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题目内容
【题目】Chen Wei isn't at school today________ he is taking part in a robot competition in Shanghai.
A.afterB.becauseC.beforeD.if
【答案】B
【解析】
略