1. (2017七下·卢龙期中) 选择词语适当形式填空，每词仅用一次。

violin  afraid  arrive   study   dream

1. （1） His son is in Beijing.
3. （2） My brother can play the .
5. （3） We can't late for school.
7. （4） It is their to have a bridge.
9. （5） It is not easy to cross the river on a ropeway, and the girl is .