---Will people live to be 300 years old ?---_______. But maybe people can live to be 200 years old.
_____ our group, Li Fei often goes to bed late _____ school nights.
—What time do you usually get _____?—Well, _____ six thirty.
There are ______ rules in my family, so what can I do?
—It is useful book!—Yeah, it tells you how to play guitar.
——What is Grace doing?——She _____ in the pool.