Ididn'tknow________.A.whattheydoB.w

发布时间：2020-07-19 10:16:47

I didn't know ________.A.what they doB.what they didC.what do they doD.what did they do

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B解析解析：what引导的宾语从句，用疑问词加陈述句的语序。
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