Question

In his letter Jack said that the days ________ he spent at college was the happiest time ________ he had ever had all his life．

1. A.
   when; when
2. B.
   when; that
3. C.
   that; which
4. D.
   that; that

Answer 1

D
该题包含两个定语从句。第一个从句中spent需要宾语，应由that/which引导；第二个从句中had也需要宾语，但先行词有最高级修饰，只能由that引导。