Question

There are forty-five students in our class, ________ are from nearby villages．

1. A.
   one-third of them
2. B.
   and one-third of whom
3. C.
   one-third of them
4. D.
   one-third of whom

Answer 1

D
本题不能选A项，因为不是一个完整的句子，所以不能用关系代词；不能选B项，因为用了连词and之后就不能再用关系代词；不能选C项，因为中间是逗号，所以不能用两个简单句。