---What do you think of my answer to the question?----Sorry, What’s that? I _______ about something else.
—Can we run across the road now? —No,we ________.We have to wait until the light turns green.
—May I play computer games now,Mom? —No.You ________ finish your homework first.
—May I take some pictures here? —Sorry,you mustn’t.Please look at the sign.It says“________”. A.NO PHOTOS B.NO TALKING C.DANGER
Hurry up,or you ________ catch the train.
—Must I hand it in today? —No,you ________.You can do it tomorrow. A.mustn’t B.can’t C.needn’t