From the beginning rivers have played an important in the life of manMan of the earliest

From the beginning rivers have played an important in the life of man．Man of the earliest times used the rivers as a means of travel．Today rivers still serve as a great waterway for the transport and people．
In ancient times, man settled near rivers or on river banks and built up large empires．
Water is nature’s most valuable gift to man．Man needs water to irrigate his crops, to cook and to wash．In nations all over the world, rivers mean life and wealth．They feed and clothe the nations around them．
Water is also a source of energy and power．Man build huge dams across the rivers to control the water for irrigation and get the energy needed to drive generators．The electrical power is then directed to homes, cities, factories and television stations．
Man uses water each day．In a small way rivers help to keep man in good health and provide for his amusements．Various forms of water sports keep man strong and healthy．
【小题1】Rivers have been important to man ．A．since they came into beingB．since the last centuryC．since a few hundred years ago．D．since the beginning of BC【小题2】Man in old times traveled from one continent to another ．A．by airB．by seaC．by trainD．by bus【小题3】Generators are machines that are used ．A．to direct electrical powerB．to control the waterC．to produce electricitD．to build dams y【小题4】Which of the following statements is true?A．People get energy by building bridges across rivers．B．In ancient times large empires grew up near dams．C．People can be provided with amusements in small rivers．D．Large rivers are still useful for transportation in modern times．A

(答案→)A 解析：【小题1】细节理解题，根据文中语句“From the beginning rivers have played an important in the life of man．”理解可知。【小题1】细节理解题，根据文中语句“Man of the earliest times used the rivers as a means of travel．”理解可知。【小题1】细节理解题，根据文中语句“Man build huge dams across the rivers to control the water for irrigation and get the energy needed to drive generators．”理解可知。【小题1】理解判断题，根据文中语句“Today rivers still serve as a great waterway for the transport and people．”理解可知。

我明天再问问老师，叫他解释下这个问题