根据句意及括号内所给单词的提示填空
One of students in our class ______(fall) into the river yesterday.
The twins have many______ (different) between them.
If you want ______(much)information about the trip ,please call us at 291-13542.
Listen! Tom is_____ (sing)in his room.
It is really _________(danger)for young children to play with fire.