A．They’ve lost their suitcases.
B．Their dorm rooms have been given to other students.
C．They can’t find their dormitory.
D．They’ve missed the bus to their dormitory.

A．They have two children already.
B．They will start a family as soon as they get married.
C．Lisa wishes to have children, but her husband doesn’t.
D．They don’t want children for the time being.