My aunt is a writer. She ______ more than ten books since 1980.
#42321
A
writes
B
wrote
C
has written
D
will write
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I don’t know if my uncle_______. If he______, I will be very happy.
#38498
A
comes; will come
B
will come; will come
C
comes; comes
D
will come; comes
—When and where        the accident        ?—It happened on the street yesterday.
#40355
A
was; happening
B
is; happening
C
was; happened
D
did; happen
---How often ___________ the Olympics _____________? ---Every four years. 
#42174
A
is, taken place
B
is, hold
C
does, hold
D
does, take place