趣味问答。

1. Ten plus ten is ten. Ten minus ten is ten. What am I?                 

2.  I have two feet.  I can walk(走路).  And I can tell you the time.

     What am I?                   

3.  Peter's father isn't at home today.

         Things (东西) are at sixes and sevens.                  

4. They go to the zoo in ones or twos.                 

如离合器间隙太大，离合器将出现（）的故障。

A.打滑

B.分离不开

C.发抖

D.异响