任务型阅读。 You must have heard of Niagara Falls ,a famous waterfall .But do you know the details of Niagara Falls ? Here is some information about it . Niagara Falls is in North America .It is found on the Niagara River .This river is the border between the United States and Canada .It connects（连接）two Great Lakes .Lake Erie and Lake Ontario .Niagara Falls has a long history .It came into being during the last Ice Age .That was about 12,300 years ago . The two countries share Niagara Falls .There are different falls on each country’s land .Lots of people come to visit t