解答

1.___which____
2.____who_____

神不知鬼不覺

答案如圖但我真的不懂!!誰能給我講解啦啦啦

1.The speed we fall at has nothing to do with our weight.→The speed at which we fall has nothing to do with our weight.
2.The customer we received the complaint from was professor.→The customer from which we received the complaint was professor.
關代有很多種用法,有不會的再問。

神不知鬼不覺

為什麼at要放fall後面ㄚ,我整個句意不太懂可以講解嗎!!

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