【题目】—Tomorrow is a public holiday, ______ our child should get close to nature.
—But I’m afraid she will have to attend a special training course.
A．where B．which C．as D．when
在线课程【答案】D
【解析】——明天是公休日，孩子应该（趁此机会）接近自然。——但是恐怕她将不得不参加一个特殊的训练课程。when是关系副词，引导非限制性定语从句。