问题
选择题
The Nile River ____ flood large areas but now the water ____ produce electricity.
A．used to; is used to
B．used to; used to
C．was used to; is used to
D．was used to; used to
答案
答案：A
题目分析：考查固定句型。句义：尼罗河过去常常淹没大片地区但是现在被用来发电。固定句型used to do 过去常常（而现在不。。。） be used to do 被用来。。。，根据句意所以A正确。