seems strange to us is the clever boy failed in the exam.A. It; thatB. What; whatC. It;

问题补充：

seems strange to us is the clever boy failed in the exam.

A. It; that

B. What; what

C. It; how

D. What; that

答案：

A. It; that

B. What; what

C. It; how

(答案→)D. What; that

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