下列各句均有一处错误,请找出并改正。

1.After a few minutes he came to myself and said, "Don't worry,I'm OK."______

2.Xiao Ming,don't play the water in the bottle.______

3.After the accident he lay on the road and almost couldn't breathe_______

4.Shall we go out for a walk after the lunch?_______

5.He went to work on foot instead driving his car.________

汽缸检修后，汽缸回装前对缸体内应做哪些准备工作？