It be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62951
A
may
B
couldn’t
C
should
D
needn’t
推荐题目
---Must he remember everything he has learned in the class?---No, he _____.
#63298
A
can’t
B
may not
C
mustn’t
D
needn’t
—Look! That man looks like Mr．Brown．—It ________ be him, for I know he is at home．
#74860
A
mustn’t
B
can’t
C
shouldn’t
D
needn’t
— Must we finish all the exercises today? — No, you ________.You can finish them within two days.
#76063
A
mustn’t
B
needn’t to
C
needn’t
D
don’t have
When I was a child，I ________ watch TV whenever I wanted to. (2013·江西，29)
#62296
A
should
B
could
C
must
D
need