We don’t have plenty of money, so we can’t afford _____ such an expensive car.
—Don’t play near the classroom,please. —________.
—Can they swim in the lake? —________.
They arrived ________ Shanghai ________ a cold morning.
There is a garden ________ the house.
—Must I start now? —No,you ________. A.mustn’t B.can’t C.needn’t