In the past three years,we ( ) great progress in our study.

In the past three years,we ( ) great progress in our study. great changes----in our city in the past three years 1took p The year 2010____(witness) great progress in our study In the past three years there great changes in Beijing. Great changes _____ in Hainan in the past three years. In the past three years great changes ___in our hometown in the past ten years she _____ great progress in the past 2 years .A,made B ,had You___a lot in the past three years. In the past ten years there ___ great changes in our hometow there——great changes in our town in the past fifteen years.A Great（）have taken place in our city in the past twenty years