1、All flights________because of the terrible weather, they had to go there by train.

　　A.were canceled　　B.had been canceled

　　C.having canceled　　D.having been canceled

　　2、The author of the report is well________with the problems in the hospital because he has been working there for many years.

　　A.informed　　B.acquainted　　C.enlightened　　D.acknowledged

　参考答案&解析：

　　1、D　非谓语动词的用法。分析结构可知逗号前面部分是一个状语结构，故可以排除B、D；又因为All flights与cancel为被动关系，所以应选A。句意：由于天气恶劣，所有的航班都已经取消了，他们不得不改乘火车去那儿。

　　2、B　动词与介词的搭配。四个选项中只有acquainted可以和介词with搭配，be acquainted with意为“对……熟悉”。句意：报告的作者很熟悉那家医院存在的问题，因为他在那儿工作了许多年。