7.Why does John want to be a doctor? A.Because he wants to make more money. B.Because he wants to live a better life. C.Because he wants to save people's lives.
11.(1)Who's going to do some shopping? A.Mr.Pettis. B.Alan and the woman. C.Mr.Pettis and the woman. (2)Which channel will the film be shown on? A.Channel 5. B.Channel 6. C.Channel 7.
13.(1)What do American students pay for? A.Their schooling. B.Their parents. C.Their living. (2)Is the schooling the same at all American colleges and universities? A.Yes. B.No. C.Sorry,I don't know. (3)How do most Americans pay for college education? A.1,000. B.10,000. C.100,000. (4)Who gives the money to the students? A.Their parents. B.The government. C.Themselves. (5)Living in school bedrooms isn't free,is it? A.Yes,they are. B.Yes,it is. C.No,it isn't.
55.You may find that all mountains look blue from far away!Why is that? Sunshine is a mix of red,orange,yellow,green,blue,indigo,and violet .Each color has a different length of wave (波長(zhǎng)).Blue has one of the shortest ones. Earth's atmosphere (大氣層) is full of tiny air molecules (分子).When light hits them,it gets scattered (散射) around.According to the website HowStuffWorks,light with shorter wavelength bounces like a ping-pong ball until it reaches our eyes.Blue light,which is about half the wavelength of red light,is scattered almost 10 times as strongly as red light.So blue is the main color of the atmosphere. More distance from a mountain means more atmosphere.Finally,the mountain disappears into the sky as we only see blue light.The same thing happens with tall buildings,too. 閱讀以上信息,用恰當(dāng)?shù)膯卧~完成下面的表格,每空一詞。
The (1)
for all mountains to look blue
(2)
lengths of the wave
?Sunshine is a mix of red,orange,yellow,green,blue,indigo and violet .Each color has a different length of the wave.Blue has a(3)
length of the wave than any other colour.
Tiny air molecules
?Earth's atmosphere (大氣層) is (4)
with tiny air molecules (分子) ?Light with shorter avelength bounces like a ping-pong ball until it (5)
to our eyes.
Distance from a mountain
?The mountain disappears into the sky as we only see blue light.