-- Whose notebook is this ? -- It _______ Mary. It has her name on it. A. must be B. can’t belong C. must belong to
.Susan’s parents have bought a large house with a swimming pool. It ______be very expensive.
The number of students in Class Ten ____ sixty-six, and a large number of them ____Jay Chou.
Would you like to go for a walk with us? ___, but I’m busy.
The train _______. Please get ready to get off.
Boys and girls, I have _________ to tell you.