根据句意用所给单词的适当形式填空.
Look! Your room is really (tidy). You should learn to be organized.
Teenagers should learn how to protect (they) from all kinds of dangers.
We are supposed to read (quiet)in the library.
Don't worry about the children. They are old enough to look after t .
In China more and more people r shared bikes to and from work.
A p at a school is a place for students to play and do sports.