第3题: [单项选择]They saw a new movie at the theatre. ______ they had dinner at a Chinese restaurant. A. then which B. which after C. after which D. after that 参考答案:C 答案解析:本题考查介词与引导词的关系。 介词after应置于引导词之前,A、B两项首先要排除。其次,that是一个空集合概念词,相当于“零”,只是句子成分,不能放在介词之后。因此只有C项可选。