The teacher told me that the earth _______ round.
#103196
A
was
B
is
C
were
D
are turning
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---The window must have taken you quite a lot of time that day. --- You are right. They ________ for weeks.
#102507
A
haven’t been cleaned
B
hadn’t been cleaned
C
didn’t’ clean
D
haven’t cleaned
Miss. Gao _______ in the library for three years. But now she is a teacher.
#102018
A
worked
B
has worked
C
had worked
D
has been working
The plane___________at 11:05. 
#103570
A
takes off
B
took off
C
will take off
D
taking off