Question

Each time _____ they met, they would talk long hours together.

A. which
B. when
C. during
D. \

Answer 1

答案D
考查连词。句意：每次他们见面的时候，他们会在一起谈好长一段时间。Each time 每次，引导时间状语从句，本身就是连词不需要再加连词，所以选D。