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.

　　P47页

　　was/were cooked knew swam got taught leaved felt smelt drove ran thought kept bought began did

　　cost found throught stood spake came gave heard sold hurt saw steal took slept sit met brought flew

　　woke chose lost read rose wore

　　P48页

　　(1) Wat's your favourite sports?