题目

战国时期李冰在岷江中游修建的闻名世界的防洪灌溉工程是 A．都江堰         B．郑国渠           C．灵渠            D．赵州桥 答案：A －I think I can't achieve my aims． －In my opinion, you shouldn't ________ such a task． [　　] A．attempt B．have attempted C．manage D．have managed