30．It was the training that he had as a childmade him such a good pianist received by tee

问题补充：

30．It was the training that he had as a childmade him such a good pianist, received by teenagers as well as adults．

A. that

B. which

C. who

D. What

答案：

(答案→)A. that

B. which

C. who

D. What

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