Mark Twain ______ school and began to work at the age of twelve.
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A
left
B
leaves
C
will leave
D
leave
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Tom said he           to Guangzhou.
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A
never went
B
had never been
C
has never gone
D
has never been
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
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A
collected
B
had collected
C
has been collecting
D
had been collecting
Jenny told me that she __ an English Speech Contest the next month.
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A
takes part in
B
is taking part in
C
took part in
D
would take part in