You _______ see a dentist when you have a toothache.
#78314
A
may
B
need
C
should
D
can
推荐题目
He _______ have taken your car by mistake because he didn’t have the keys.
#63034
A
mustn’t
B
shouldn’t
C
couldn’t
D
needn’t
—I’m sorry. I ________ at you the other day.— Forget it. I was a bit out of control myself.
#63421
A
shouldn’t shout
B
shouldn’t have shouted
C
mustn’t shout
D
mustn’t haven’t shouted
Surely Mr. Peterson ____ have forgotten to buy presents for his beloved family members. After all, it was Christmas!
#63397
A
shouldn’t
B
mustn’t
C
can’t
D
needn’t
All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.
#74653
A
something useful
B
anything useful
C
useful something
D
useful nothing