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. that; which
B. which; where
C. when; that
D. when; which
网友回答
A. that; which
B. which; where
C. when; that
(答案→)D. when; which
解析：spring后定语从句主系表结构少状语，先行词是时间，故定语从句用when引导；第二个为非限制性定语从句，指代前面一句话内容，故用which引导。句意：大自然在春天是最美的，这时候各种鲜花盛开，这也吸引了来自各行各业的人们去春游。所以D选项正确。