【例题3】
The book has helped me greatly in my daily communication, especially at work ______ a good impression is a must.
A．which B．when C．as D．where
【答案】 D
【解析】本题考查定语从句中关系副词的使用。
句意：这本书在我的日常交流方面给予了我很大帮助，尤其是在必须给别人留下一个好印象的工作中。
五、课堂运用
【基础】
1．I didn't become a serious climber until the fifth grade，________ I went up to rescue a kite that was stuck in the branches of a tree.
A．when B．where C．which D．why
【答案】A
【解析】本题考查定语从句中关系副词的使用。
句意：我直到五年级才成为一个真正的攀登者，那一年我爬上了树枝去够一只被卡的风筝。
2．Care of the soul is a gradual process ________ even the small details of life should be considered. A．what B. in what C．which D．in which
【答案】D
【解析】本题考查定语从句中介词+关系代词的使用。
句意：灵魂的洗礼是一个渐进的过程，在这个过程中，生活的每一个细节都要考虑到。
3．In our class there are 46 students, ________half wear glasses. A．in whom B．in them C．of whom D．of them
【答案】C
【解析】本题考查定语从句中介词+关系代词的使用，表所属，应用of。