Question

There was a time_____we went to the country and stayed with the farmers there.  

A．which

B．that

C．when

D．while

Answer 1

C

考查定语从句，这是一个固定句型There was a time when 曾经有一段时期，句意：曾经有一段时期我们去了乡下和那的农民呆在一起。所以选C。