单项选择题

The United States and Canada have agreed ________in regard to the Great Lakes.

A．to eliminate swimming entirely
B．to limit boating and fishing
C．to limit phosphates and detergents
D．to kill all algae
<上一题 目录 下一题>
热门 试题

单项选择题
________has been the major problem in the Great Lakes in recent years.
A．Too many algae
B．Excessive recreational use
C．Lack of adequate rainfall
D．Too much evaporation
单项选择题
This conversation is mainly about________.
A．United States-Canadian agreement
B．Unlimited growth in population
C．Pollution in the Great Lakes
D．The limited supply of phosphates
相关试题