Question

I bought two hats yesterday in the store, ________ will go with my red coat．

1. A.
   the redder one
2. B.
   the redder of which
3. C.
   redder of which
4. D.
   the reddest of which

Answer 1

B
考查比较级。这里是指两顶帽子之间较红的那个，应使用the redder of…，再根据句子结构可知，这又是一个非限制性定语从句，因此整个答案为the redder of which。