Choosing the right circle of the friends will ____ us a lot of troubles, heartaches and possibly a life of deep regret.

_____ are you?—I’m twenty.[ ]

There are 60 students in my class and 44 of them use weibo veryoften.—44? That means about_______of your classmates are weibo users, right?

Peter is a good doctor.

Where is Jim? — He _________ to the museum. He hasn’t come back.