(2009-07-28 09:04)-
where did you get to know the professor over there?It was at the workshop__we did research together two years ago.A.that B.there C.wh...全文
◆
◆
-
liuyuting126：where 是指代前面的workshop这一地点，这和at没有关系，不用考虑(2009-07-26 16:36)
-
Dthuang：这样不是重复了吗(2009-07-26 13:26)
