__has happend is that in the past three years great changes

__has happend is that in the past three years great changes In the past three years there great changes in Beijing. Great changes _____ in Hainan in the past three years. great changes----in our city in the past three years 1took p There( ) great changes in Shanghai in the past few years. Great changes( )place in China in the past 20 years. Great changes ---- in my hometown in the past few years. Great changes ______in Guangzhou in the past five years. great changes ___in our hometown in the past ten years Great changes _______in the past two years. In the past three years In the past years,there （ ）great changes in my hometown 填 ha