is no doubt he will be successful someday. A. There; whetherB. There; thatC. It; whether

问题补充：

is no doubt he will be successful someday.

A. There; whether

B. There; that

C. It; whether

D. It; that

答案：

A. There; whether

(答案→)B. There; that

C. It; whether

D. It; that

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