被动语态和非谓语动词分析...直接跪求高手前来分析分析!

题目

被动语态和非谓语动词分析...直接跪求高手前来分析分析!
1.Air needs____in the workshop a certain number of times every hour
A.to change B being changed C changing D be changed
我觉得是B 才对吧,被换嘛.应该是有被动的才对的啊.
求分析,顺便求个翻译,
2..____that Easton had got promoted,his friends came to congratulate him on that
A.Having been heard B Being heard
C To have heard D Having heard
有先后顺序,先于谓语之前（congratulate him on）发生的动作,表示先听到,后祝贺
应该用完成式 D 不知道我这样分析中不?但是为什么不能是被听到呢?求分析,再有我感觉这个C 好象也对.麻烦大家了这么多问题,呵呵~,

答案

1.Air needs____in the workshop a certain number of times every hour C changing 要掌握实义动词need 的用法：sb need to do sth.某人需要自己做某事sb need doing /to be done某人需要别人做某事sth need doing ...