于和伟妻子去探过班吗:帮忙做下下面几个题,很简单的，答完我给附加分20分。谢谢了！

一、短语互译
share a flat
play the role of
a want ad
a popular pastime
值班，值日
二、词性的转变1.）
写出下列动词的名词形式：
combine examine arrive mark
2.）写出下列动作的执行者：
teach act music science
3.）写出下列词的形容词形式：
help collect nature agree
4.）写出下列形容词的副词形式：
active accidental comfortable angry
5.）写出下列形容词或名词的动词形式：
normal familiar economy system
三、用适当的介词填空
1、Fruit is rich ________ vitamins .
2、The manager was not pleased _______ his work .
3、The food do good ____ _ your health .
4、That language is spoken a few people in the islands.
5、He didn’t come to the meeting because his illness.
6、It is easier to travel the summer and the autumn.
7、This experience is familiar ________ us all.
8、Will you go down to my office ______ a chat?
9、He heard that someone was knocking _______ the door.
10、Do you know the girl who is standing ______ the doorway?