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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】三峡工程的作用是
A.
调控长江中游洪水水量，减少洪涝灾害
B.
蓄存上游洪水，减少中游地区的灌溉面积
C.
增加上游河段流速，降低长江的通航能力
D.
调控了长江下游支流注入长江干流的水量
【单选题】Thousands of people took part in the work when the Three Gorges project (三峡工程) _____.
A.
was built
B.
was building
C.
was being built
D.
had been built
【单选题】Thousands of people took part in the work when the Three Gorges project (三峡工程) _____.
A.
would be built
B.
was building
C.
was being built
D.
had been built
【单选题】Thousands of people took part in the work when the Three Gorges Project (三峡工程) .
A.
would be built
B.
was building
C.
was being built
D.
had been built