Listen, a small number of students ______ in the classroom. 
#40135
A
talk
B
talks
C
is talking
D
are talking
推荐题目
--- How long have you ________ Hong Kong?--- For two weeks.
#40619
A
been to
B
gone to
C
been in
D
arrived in
---What’re you _____?---My husband’s health problem _____ me a lot.
#38644
A
worrying,worries
B
worried about,worries
C
worried about,worries about
D
worrying about,is worried about
While Jim ______the floor, someone ______at the door.
#40407
A
was sweeping, was knocking
B
was sweeping, knocked
C
swept ,was knocking
D
swept, knocked
---Is the Youth Center open to the public yet?---Yes. It ______ for almost one and a half years.
#36333
A
has opened
B
has being opened
C
has been open
D
was open