9、　　 to the concert tomorrow.

A、All but he and I am going　　　　 B、All but he and I are going

C、All but he and me are going　　　 D、All but his and me am going

8、----Who could do a thing like this?

----　　 but my brother ,I’m afraid.

A、Anyone　　　 B、Nobody　　　 C、Everybody　　　 D、Someone

7、I don’t think　　 of the young couple was pleased to see us.They had gone away when we reached their house.

A、none　　　　 B、either　　　 C、neither　　　 D、any

6、Both teams were in hard training　　 was willing to lose the game.

A、either　　　　 B、neither　　　 C、another　　　 D、the other

5、----Was it in 1969　　 the American astronaut succeeded　 landing on the moon?

----Yes,that’s right.

A、when;on　　　 B、that;on　　 C、which;in　　　 D、that;in

4、Of the five men one is from Japan,and 　　　are from China.

A、other four　　 B、the other four　　 C、four others　　　 D、others

3、We needed a new cupboard for the kitchen.So Peter made 　　from some wood we had.

A、it　　　 B、one　　　 C、himself　　　 D、another

2、The population of China is larger than 　　　of Japan.

A、this　　　 B、that　　　 C、those　　　 D、these

1、It is easy to do the repair,　　　 you need is a hammer and some nails.

A、something　　 B、all　　　 C、both　　　 D、everything

17. 已知平行六面体的底面为正方形，分别为上、下底面的中心，且在底面的射影是。

(I)求证：平面平面

(II)若点分别在棱上上，且，问点在何处时，

(III)若，求二面角的大小(用反三角函数表示)