—We _____ talk loudly when we see the sign “Be quiet” on the wall.
—Yes, you are right. We should be polite in public.
A.must | B.mustn’t |
C.need | D.needn’t |
—We _____ talk loudly when we see the sign “Be quiet” on the wall.
—Yes, you are right. We should be polite in public.
A.must | B.mustn’t |
C.need | D.needn’t |