randfather still seems very energetic, although he is already in his seventies now.—Yes, he _______in the army for three years when he was young.

There’re_____in the library,and you are _____to read any book you want to read.

When will you come to visit our city, on Saturday or Sunday— ___________ day is OK. I’m free at weekends.

What happened_____Millie

It is required that the students _____ mobile phones in our school, so seldom _____ them using one. [ ]