In recent years, the economy of our country _________ rapidly.
#39782
A
is increased
B
has increased
C
increased
D
has been increased
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Great changes______ in the city since1970.
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A
have been taken place
B
have taken place.
C
has taken place
D
took place
 His father           Beijing. He is staying there for two days.
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A
is leaving
B
is leaving for
C
is going
D
is
While Ann ___ TV, her father came home.
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A
is watching
B
was watching
C
watch
D
watches