We can see a lot of flowers and (nation) flags around Tian'anmen Square on October 1st.
The second﹣hand car is much (cheap) than the new one.
This is Mary's (three) time to visit the beautiful city.
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 .