P41页 　　一 helicopter abacus ferry ambulance handcuffs purse cycling trainer astronaut　　二 one hundred and fifty-eight　　two thousand and one　　fourty-five percent　　zero point twenty-five　　six point zero three　　sixty degree　　six point fifty-nine　　one thousand five hundred and seventy-one　　one/sixth　　three/fifth　　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.　　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?　　(2) A man steal a purse from a tourist.　　(3) They did cought the thief.　　(4) Our class consist of 40 students.　　(5) I aim the torch at his eye.　　P49 (横着写)　　1、 I attend school everyday. I attended church yesterday.　　I will be attending a concert tomorrow.　　I have to explain why I am late everyday.　　I explained the question to her two days ago.　　I will be explaining the details next week.　　The thief steals everyday.　　He stole the wallet last Sunday.　　They will be stea