题干
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
答案(点此获取答案解析）
A
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
