【题目】Mother bought many tomatoes from the market two days ago, ________ some have gone bad due to the bad weather.
A.of those
B.from which
C.of which
D.in which

【答案】C
【解析】此处表示“其中的一些西红柿”，故用“介词＋关系代词”引导非限制性定语从句。