Question

I can never forget the days _____ we worked together　and the days ______ we spent happily together.

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

Answer 1

C
试题分析：考查定语从句，先行词是the days，第一空填when，因为定语从句中缺少时间状语，第二空填which，因为定语从句中缺乏宾语，句意：我永远不能忘记我们一起工作的日子和我们一起快乐度过的日子。选C。
考点：考查定语从句一要看先行词，而要看从句的成分，如果缺少主宾表，要用that或which如果缺少状语，要用关系副词where，when或why。定语从句中缺少介词，要用介词+whom/which。