19.16.There are many ___________ in Li Ming's family. A.books B.rules C.rooms 17.Li Ming isn't allowed to watch TV or surf the Internet __________ too much. A.at home B.at school C.in the school library 18.Li Ming has to __________ before 11:00 pm. A.drink milk B.watch TV C.go to bed 19.Li Ming doesn't agree to clean his room every morning because __________. A.his room is not always dirty B.he is busy with schoolwork C.he doesn't like doing housework 20.Li Ming thinks his parents won't do anything that is __________ for him. A.good B.bad C.helpful.