题目

完型填空）A rich father wanted to show his son how poor people can be. One day, he took his young son ________ a trip to the country. They ________ a day and night on the farm of a very ________ family. When they got back from their trip, the father asked his son, “How was the ________?” “Very good, Dad!” “Did you see how poor people can be?” the father asked. “Oh, yes!” “And what did you ________?”The son answered, “I saw that we have a dog at home, but they have four. We have a swimming pool in the garden while they have a river that has no ________ . We have如图，已知双曲线y=kx与直角三角形OAB的斜边OB相交于D，与直角边AB相交于C．若BC：CA=2：1，△OAB的面积为8，则△OED的面积为（　　）A．43B．2C．83D．4