The Taiwan spotted deer, Fan Xing and Dian Dian, __________ to the Chinese mainland on April 16, 2011.
#44923
A
have sent
B
were sending
C
were sent
D
had sent
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Trees ________ every year to make our city greener.
#44941
A
plant
B
are planted
C
were planted
D
will be planted
Our classroom is tidy because it ____ every day.
#44421
A
cleans
B
cleaned
C
is cleaned
D
was cleaned
All the information _____ writing the report. 
#44725
A
is used for
B
is used to
C
is used as
D
is used by
She was seen ____ the theatre at that moment.
#44861
A
go into
B
to go into
C
went into
D
going into