They couldn’t say it was troubled them.A. that; whatB. what; whatC. what; thatD. what; w

问题补充：

They couldn’t say it was troubled them.

A. that; what

B. what; what

C. what; that

D. what; who

答案：

A. that; what

B. what; what

(答案→)C. what; that

D. what; who

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