TheRiverNile

問題詳情：

 The River Nile________ flood large areas, but now the waters of it ________ electricity.

A. is used to; used to produce                  B. used to; used to produce

C. used to; are used to producing               D. used to; are used to produce

【回答】

D

知識點：動詞

題型：選擇題