题目

调节水资源季节分配不均的主要措施是          A．修建水库                                               B．跨流域调水       C．节约用水                                               D．修建机井，抽取地下水 答案：A—Is Mr Brown driving here? —I’m not sure. He ______ come by train. A. may B. shall C. need D. must