问题
选择题
Parents should pay attention to the cases _______ their children have difficulty adapting to new surroundings.
A．where
B．as
C．why
D．when
答案
答案：A
题目分析：考查定语从句：句意：父母应该注意这样的情况，孩子们对适应新的环境有困难。先行词是the cases，定语从句中缺少地点状语，用where引导定语从句，选A。