Sir, you ______ be sitting in this waiting room. It is for women and children only. 
#87994
A
oughtn’t
B
shouldn’t
C
won’t
D
needn’t
推荐题目
Bob said he was going to join our club but he didn’t. What a shame! He ______ his mind.
#87666
A
can’t have changed
B
mustn’t have changed
C
wouldn’t have changed
D
shouldn’t have changed
 You could have seen Fang Zuming________ yesterday morning.
#86670
A
did you come
B
if you came
C
had you come
D
if you should come