wind power is an ancient source of energy to which we may return in the near future
wind power is an ancient source of energy to which we may return in the near future
為什么用to which
為什么用to which
英語人氣：419 ℃時間：2020-05-08 14:37:46
優(yōu)質解答
return to,which引導定語從句,將從句中的介詞提前了.
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