P43页

　　一 play football wash his face play the violin make phone calls to sb. arguing fishing

　　二 (1)1,000、120、852 (2)15、79、17、27、2,005 (3) 3/10、3/5、3/7、7/9 (4) 50%、75% (5)25°、160°

　　(5)0.78、11.45、21.13、57.22、6.5

　　P44页

　　(1)Sun is the only star in our salar system.

　　(2) It gives us heat and light.

　　(3) The moon is just 380,000 kilometers away.

　　(4) It looks much smaller because it is very for away.

　　(5) It takes four years for light to reach us from Alpha Centauri.

　　P45页

　　二 自己填,因为是按自己实际情况回答的问题