真题练习

935.In a sports team each player has a clear role,and there are few occasions __ members are confused or uncertain of their roles.

A.which
B.that
C.when
D.how

936.Can you give me a case _____ this phrase can be used?

A.when
B.that
C.where
D.which

答案解析

935.答案是C;先行词为occasion指某些情况，时刻，且从句中不缺少成分，故用when引导定语从句。
936.答案是C;先行词为case指某种情境，用where=in which引导。