---- was it you discovered the secret of his?-----Totally by chance .A. How; thatB. How; w

问题补充：

---- was it you discovered the secret of his?

-----Totally by chance .

A. How; that

B. How; when

C. What; that

D. What; when

答案：

(答案→)A. How; that

B. How; when

C. What; that

D. What; when

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