(1分)﹣This area has changed beyondrecognition. ﹣Indeed. But for the reform and opening﹣up policy, p...

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did the city change the city changed has the city changed the city has changed

did China change China has changed has China changed China had changed

changed has changed have changed is changed

is changed；is looked is changed；looks has changed；is looked has changed；looks

used to be, change used to be, changed has been, has changed is, has changed

did China change China has changed has China changed China had changed

is changed was changed has changed had changed

did the city change the city has changed has the city changed the city changed

has changed ; well changed ; good has changed ; better changed ; better

changed; got married changed; has been married has changed; got married has changed; has been married

changes, countries changed, country has changed, countries had changed, countries

did the city change the city changed has the city changed the city has changed

would change has changed changed was changing

used to be , change used to be , changed has been , has changed is , has changed

is changed was changed had changed has changed

has changed have changed has change changed

has changed has been changing was changed is changed

had Hefei changed Hefei has changed has Hefei changed Hefei had changed

has changed ; well changed ; good 　　 has changed ; better changed ; better