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I wonder makes him so sad. A. what it is that B. what is it that C. what it is D

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I wonder makes him so sad. A. what it is that B. what is it that C. what it is D

I wonder _______ makes him so sad.

A. what it is that

B. what is it that

C. what it is 

D. what is it

试题答案

A

 

考查宾语从句使用了强调句型。题干意为:我想知道到底是什么使他如此悲伤。