At school I___wear a uniform and I ___keep my hair short.A.can’t; have toB.have to ;must C.don’t have to;must
—Would you mind my___________ here? —___________. We can’t stand it!
—He was___________ tired___________ he fell asleep as soon as he lay down. —Oh, we can go out and let him have a good rest.
—Do you know the person with __________ he always chatted online? —Yes, one of his QQ friends.
—Could you tell me ________? —Of course, last night.
—Everyone except the twins ____________ Beijing. —Oh, their mother is ill, so they have to look after her.