问题补充:
Look at the sign! It says “No Smoking!” You smoke here. It’s dangerous.
A. mustn’t
B. ought not to
C. needn’t
D. don’t have to
答案:
(答案→)A. mustn’t
B. ought not to
C. needn’t
D. don’t have to
解析:
试题分析: 句意:看那个标志,写着“禁止吸烟!”你千万不要在这儿吸烟,危险。 mustn’t千万不要, ought not to不应该, needn’t不必, don’t have to不必。根据 “No Smoking!”禁止吸烟!和It’s dangerous吸烟危险,it指代吸烟,可知答案选A.