Question

【题目】When a driver sees the sign "STOP", he ______ stop. He ______ go on.
A.must; mustn't
B.mustn't; must
C.can; can't
D.can't; can

Answer 1

【答案】A
【解析】句意：当司机看见“停”的标志时，他必须停下来，他一定不能继续前进。must必须；mustn't表禁止，一定不要，必须不；can能；可以；can't不能；不可能。