题目内容
9. The Three Gorges Dam,which is the biggest construc- tion project in China since the building of the Great Wall and the Grand Canal, to control flood- ing and provide hydro-electric power for the central region of China.
A. was built B. is built
C. will be built D. has been built
9. D
9. D解析:由since引导的时间状语可 知,应用现在完成时态,故选D项。
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