Skating can be good for you________correctly.A、though doingB、though doneC、if d

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问题 Skating can be good for you________correctly.

选项 A、though doing
B、though done
C、if done
D、if doing

答案 C

解析本题考查省略句。if引导的是条件状语从句，完整的形式应该是：Skating can be good for you if it is done correctly．从句中的主语it和主句的主语skating一致，主语和be动词可以省略。故选C。句意为：如果滑得适当，滑冰将会对你有好处。

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