题目内容：

根据句意，用所给动词的适当形式填空。

1.We all know that smoking        ( not allow) in public places.

2.Boys and girls,        (put) all your effort into study and you will surely get good grades in the high school entrance examination.

3.Yancheng is well worth        (visit) because it has many tourist attractions now.

4.We really hope a high-speed rail        (build) between Yancheng and Shanghai in the near future?

5.Look, can you see those balloons        (rise) up in the sky.