简介： 二、单项选择（共15题；每题1分，计15分） 从A、B、C、D四个选项中选出一个可以填入句中空白处的最佳答案。 21. After John graduated, he went on to study in _______ university instead of going to work. A. a B. an C. the D. / 22. The engineer has won high_________ from everyone because of his hard work. A...