Must I stay here with you?– No, you ______. You may go home, but you _____ go to the net bar(网吧).

This is my sister Ann. —Is _____ a student?

He is going to buy a new house______ the money.[ ]

When I entered the classroom, _______ my surprise, all of the students stood up quickly.[ ]

____________ you may have, you should gather your courage to face the challenge.