is important to a person is he must know he is fit for.A. What; that ; whatB. That; how

问题补充：

is important to a person is he must know he is fit for.

A. What; that ; what

B. That; how; what

C. It ; that ; that

D. It; what ; that

答案：

(答案→)A. What; that ; what

B. That; how; what

C. It ; that ; that

D. It; what ; that

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