—Excuse me. Could you wake me up when my friend ______here?—Of course. But we still don’t know when your friend ____ here.
—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