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\; a a; the \; the the; a
left his hometown come to China become a basketball player studied in this university
a; the / ; a / ; the the; a
earns earning earned to have earned
a; the /; a /; the the; a
used to get used to become used to has got used to
A. has been increasing; are have increased; is has been increased; is had increased; are
changes, countries changed, country has changed, countries had changed, countries
have; is has; are have; are has ; is
Since Though Thanks to if
a; the /; a /; the the; a
A. has been increasing; are have increased; is has been increased; is had increased; are
who has been to the USA in our class what was wrong with my computer when did China become a member of the World Trade Organization that China had successfully held the Olympic Games
Whether Since Though Unless
held；had become was held；had become held；has become was held；has become
/; a /; the a; the the; a
became had become has become becomes
a; the 不填; a the; a the; the
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