1. 用方框内所给词的适当形式完成下列句子（有一项多余）

first aid    brave    stay    sure    write    because

1. （1） Be and you will win the match.
3. （2） Last Saturday, I got to the station late there was lots of traffic, but luckily the train was still there.
5. （3） Many volunteers offer in the Olympic Games.
7. （4） Make you turn off the lights before you leave the classroom.
9. （5） He has trouble the composition.