一道英语题就一道哦
-where did you get to know the professor over there?
-It was at the workshop___we did research together two years ago.
答案是where?为什么?workshop前不是有at吗?还原后不是we did research together at the workshop two years ago 吗?为什么还要用where?那不就相当于有2个at了吗?
我是问为什么不用which?