Question

In our school there are more than 3000 students, about two fifths of ________ are girls．

1. A.
   which
2. B.
   them
3. C.
   who
4. D.
   whom

Answer 1

D
本句构成含有定语从句的复合句。可能误选B项。注意英语中句与之间用句号而不是逗号。