Great changes ___ in the city, and a lot of factories ___. A. were taken place, were set up B. have taken place, have set up C. have taken place, have been set up D. have been taken place, have been set up

Great changes ___ in the city, and a lot of factories ___. A. were taken place, were set up B. have taken place, have set up C. have taken place, have been set up D. have been taken place, have been set up

正确答案：C