They have no idea at all ( )Awhat he is working on Bwhat is he working on Cwhat did he work onDAwhat he is working 为什么选A?不选D?A的结尾不是介词吗?选他不就缺宾语吗?句意不就不完整了?

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They have no idea at all ( )Awhat he is working on Bwhat is he working on Cwhat did he work onDAwhat he is working  为什么选A?不选D?A的结尾不是介词吗?选他不就缺宾语吗?句意不就不完整了?

They have no idea at all ( )Awhat he is working on Bwhat is he working on Cwhat did he work onDAwhat he is working 为什么选A?不选D?A的结尾不是介词吗?选他不就缺宾语吗?句意不就不完整了?
They have no idea at all ( )Awhat he is working on Bwhat is he working on Cwhat did he work on
DAwhat he is working 为什么选A?不选D?A的结尾不是介词吗?选他不就缺宾语吗?句意不就不完整了?

They have no idea at all ( )Awhat he is working on Bwhat is he working on Cwhat did he work onDAwhat he is working 为什么选A?不选D?A的结尾不是介词吗?选他不就缺宾语吗?句意不就不完整了?
这是一个名词性质的从句 名词性质从句遵循陈述语序 BC不行 没有D选项啊
介词后的成分就是what所指代内容啊 作为单独的疑问句我们也会说 what is he working on? he is working on his report...

从句后是陈述语序。

因为这个大句子句子不是疑问句,后面跟的是用what引导的个从句,所以不能用疑问句的形式来做。

傻啊 A选项的宾语就是what 啊 D选项是什么