there have been many changes --- in my hometown in the last ten y_英语解答

there have been many changes --- in my hometown in the last ten yeas
a\ happen
b\ happened
c\ happening
d\ to happen
为什么答案选c
说明理由

人气：216 ℃　时间：2019-12-01 12:28:00

解答

这是there be ...doing 的固定句型,译为有.事正在发生.本句用的是现在完成时.这才是正解.欢迎追问,