Niagara Falls ______.
A.was formed by glaciers
B.receded at the end of the last ice age
C.runs to the Atlantic Ocean at the end
D.formed the Great Lakes
正确答案是C
Niagara Falls ______.
A.was formed by glaciers
B.receded at the end of the last ice age
C.runs to the Atlantic Ocean at the end
D.formed the Great Lakes
正确答案是C