They have no idea at all . A. what he is working on B. what is he working on C.
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They have no idea at all ____.
A. what he is working on B. what is he working on
C. what did he work on D. what he is working
试题答案
A
解析:
名词性从句.定语从句中应用陈述语序结构，故选A。