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7.Could you tell me      a moment ago?(  )
A.what were they talking aboutB.what are they talking about
C.what they were talking aboutD.what they are talking about

分析 你能告诉我刚才他们在讨论什么吗?

解答 本题要填的是宾语从句,宾语从句中应该用陈述语序,
即应为引导词what+主语+谓语,从而排除A、B;
根据a moment ago,知从句动作发生在过去,应用一般过去时.
故选:C.

点评 本题考查宾语从句的语序和时态.宾语从句通常是陈述语序,引导词what+主语+谓语,宾语从句时态原则:主现从随便,主过从必过,真理规律永一现.

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