题目

Tom is the son of a farm owner. One New Year’s Day, when he was 15, his father asked him 36   on the farm for one year when he was free. Tom was 37   with his father’s idea.“That isn’t my job. I have  38  school work to do.” Hearing this, his father said, “I promise to give you the best present if you  39   finish one year’s work.” Tom thought for a while and 40   . Starting one Saturday, the boy got up early and worked hard until evening, just like  41 farmer. Time passed quickly. Tom’s crops(庄稼) grew well. 42   the last day of the year, the father如图，已知AB//CD，∠1=∠2，∠E=50°，则∠F= [     ]A.40°B.50°C.60°D.70°