— Listen! Helen is singing in the classroom.—It _______ be Helen. She has gone to Shanghai.
#74428
A
mustn’t
B
may not
C
can’t
D
should
推荐题目
-May we leave the classroom now? -No, you ______. You ______ to leave until the bell rings.
#78353
A
mustn’t, are allowed
B
don’t have to, are supposed
C
needn’t, aren’t allowed
D
can’t, aren’t supposed
—The similarities between social networks are striking.—That ________ come as no surprise，because they are all products of the Internet.
#62485
A
should
B
shall
C
may
D
must
(2013·安徽高考)It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62392
A
may
B
couldn't
C
should
D
needn't
—Could I please use your computer?— .
#63566
A
Yes, I can.
B
Yes, you can’t
C
Sorry, you can’t
D
No, I can’t.