Question

—Susan’s parents have bought a large house with a swimming pool.?
—It               be very expensive.?

A．must

B．can?

C．mustn’t

D．can’t、

Answer 1

A

句意：苏珊的父母买了一座带游泳池的大房子。一定非常漂亮。所以选A, must     一定，肯定。