-- 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
The haze or smog was so serious that the winter running _________.Some students complained as they ran
#62272
A
could have cancelled
B
should have cancelled
C
must have been cancelled
D
ought to have been cancelled
—Must I water the flowers now? —No, you ________ . You __________ do it later.
#74201
A
mustn’t, must
B
mustn’t, may
C
needn’t, may
D
needn’t, must
Mary _______ her mother with the housework, but she didn’t.
#63072
A
must have helped
B
ought to have helped
C
must help
D
should help
— Simon, when are we going to have a class meeting this week?— Sorry. Ask our monitor, please. He know.
#75620
A
may
B
can
C
will
D
shall
—Mother, I climbed up to that tall tree and picked this big apple. —Jesus! You______ down and hurt yourself.
#62619
A
might have fallen
B
might fall
C
must have fallen
D
must fall