A.must | B.should | C.mustn't |
A.out | B.down | C.up |
A.shout | B.shouting | C.shouts |
A.teacher | B.policeman | C.doctor |
A.Whose | B.How many | C.Where |
A.Excuse me | B.I'm sorry | C.I don't know |
A.the; the | B.the; / | C./; / |
A.can't | B.not | C.don't |
A.can | B.can't | C.does |
A.can | B.shouldn't | C.must |