问题
选择题
Nature is at its most beautiful in spring ________ all kinds of flowers are in blossom, _______ attracts people from all walks of life to take a spring outing.
A．when; which
B．which; where
C．when; that
D．that; which
答案
A
题目分析：句意：大自然最美丽的是，春天各种各样的鲜花盛开的时候，这吸引了来自各行各业的人们去春游。第一空关系副词when在其引导的定语从句中做时间状语，相当于in spring；第二空用关系代词which引导非限制性定语从句，其作用相当于前面的整个主句，故选A。
考点: 考查定语从句的用法。