题目

三峡水利枢纽工程是化水害为水利的著名工程。中国先民兴建的下列工程中也具有这一特点的是                            A．都江堰    B．长城    C．大运河    D．灵渠 答案：AThe boss looked very worried and demanded that the work________before we went home.A.wound be finishedB.was finishedC.must be finishedD.be finished