问题
选择题
－Sunday is a public holiday, ___ children should get close to nature.
－But most of them have several lessons to attend.
A．where
B．which
C．in which
D．when
答案
答案：D
题目分析：句意：--星期天是个公共假日，这时孩子们应该接近大自然。--但是大多数孩子有几堂课要上。先行词是a public holiday，定语从句中缺少时间状语，用when引导定语从句，选D。