-- Are these _______ all from No. 2 Middle School? -- Yes. They often _________ their free time to help the old here.
#74662
A
volunteers; volunteers
B
volunteer; volunteers
C
volunteers; volunteer
D
volunteer; volunteer
推荐题目
(2013·安徽安庆二模)—She looks very happy. She ________ have passed the exam.—I guess so. It's not difficult after all.
#62414
A
should
B
must
C
could
D
might
—It's no easy task to catch a ticket on a website that receives 1 billion clicks daily.—I can't agree with you more. There ________ be errors for every single step.
#62404
A
should
B
must
C
can
D
will
According to the traffic rules, you _________ wear the safe belt while you are driving.
#62676
A
can
B
need
C
may
D
shall
It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62306
A
may
B
couldn’t
C
should
D
needn’t
He ______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
#62659
A
wouldn’t
B
shouldn’t
C
couldn’t
D
mustn’t