lots of people's lives ____(change)becauseof the flood in 1998

lots of people's lives ____(change)becauseof the flood in 1998
lots of people's lives ____(change)becauseof the flood in 1998

lots of people's lives ____(change)becauseof the flood in 1998
答案是have changed

填were changed。因为发生在1998，是过去，同时人民的生活是被改变。

changed
状语in 1998，表明是过去时间，所以用一般过去式

lots of people's lives _were changed_(change)because of the flood in 1998.
很多人民的生活被1998年的洪水改变了。