题目内容：

That is ____I gave him yesterday A.what B.when C.it D.that idea是可数名词吗

优质解答

That is whatI gave him yesterday.用what指代 我给他的东西
idea作思想观念构想等,可数/不可数
He destroyed feudal ideas in literature.
Have you any idea on this matter?
指打算,信念,意见等,可数
I've an idea that he'll soon quit the job.