She followed the receptionist down a luxurious corridor to a closed door, _____

游客2024-09-13  8

问题 She followed the receptionist down a luxurious corridor to a closed door, _____ the woman gave a quick knock before opening it

选项 A、wherein
B、on which
C、but when
D、then

答案 B

解析 分析句子结构可知,逗号后的从句为非限制性定语从句,修饰先行词a closed door,敲门的介词搭配为give a knock on a door,把on a door提前引导从句,将a door替换成which,就变成了on which,故选B。wherein相当于in which place,搭配的介词不对,可排除A。but连接表转折的并列句,前后分句之间意思不存在转折,且并列句不需要再加从句引导词when,故排除C。D项then不能连接并列句,若要选D。需要在then前加and,故排除D。
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