根据句意，用所给动词的适当形式填空。 小题1:We all know that
题型：完形填空
问题：
根据句意，用所给动词的适当形式填空。
小题1:We all know that smoking ( not allow) in public places.
小题2:Boys and girls, (put) all your effort into study and you will surely get good grades in the high school entrance examination.
小题3:Yancheng is well worth (visit) because it has many tourist attractions now.
小题4:We really hope a high-speed rail (build) between Yancheng and Shanghai in the near future?
小题5:Look, can you see those balloons (rise) up in the sky.