When the teacher came in , the students about the new film .
#37507
A
are talking
B
were talking
C
talked
D
talking
推荐题目
It _____ last week that the haze(雾霾)in Beijing caused many problems.
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A
reports
B
reported
C
is reported
D
was reported
Mr. Wang is a teacher. He ______ in this school for 20 years.
#36963
A
has worked
B
worked
C
will work
D
works
The scientists ________ on the new medicine for two years. They will succeed in no time.
#38384
A
work
B
are working
C
have worked
D
will work