The students       the Art Festival when I passed by their school.
#41616
A
celebrate
B
were celebrating
C
will celebrate
D
have celebrated
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Tom said he           to Guangzhou.
#40149
A
never went
B
had never been
C
has never gone
D
has never been
Don’t make a noise! They _______on a physics problem now.
#41516
A
will work
B
are working
C
worked
D
have worked