单项选择题
We learn from the first paragraph that（）
A．Jack is a dull boy because he works all day long B．recreation is necessary for all of us C．we should maintain good health and enjoy life D．we should work more efficiently
单项选择题 The windmill, which has been used for hundreds of years to pump water and grind grains,（）redesigned to pro duce electricity.
单项选择题 Mr. Wilson（）from his carving and eyed Edna severely.
单项选择题 （）the flood, the ship would have reached its destination on time.
