75. Taiji boxing is good health so the old man began to practise it ten years ago and no

问题补充：

75. Taiji boxing is good health, so the old man began to practise it ten years ago and now he is good it.

A. for; to

B. to; for

C. for; at

D. at; for

答案：

A. for; to

B. to; for

(答案→)C. for; at

D. at; for

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