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did China change China has changed has China changed China had changed
has been to has come to has been in has arrived in
did China change China has changed has China changed China had changed
has been to has come to has been in came to
has been to has come to has been in has gone to
a; the the; a /;/ the; the
came; has been teaching has been; has been teaching came; have been teaching has gone; have been teaching
has been in has been to has come to came to
when has Hongkong returned to China? how long Hongkong has been back in China? when had Hongkong been back in China? how long Hongkong had returned to China?
a； the the； a /；/ the； the
is, billions are; billions is; billion are; billion
a; the the; a /;/ the; the
are Chinese; has risen by are China; has fallen by is Chinese ; have increased is China; have reduced by
has China made China has made does China make are made in China
A.did China perform China has performed was China performed China is performing
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