2014新版外研版英语八年级下册M3 U2.pptVIP

Scientists have discovered many other_________ in the universe. So it is ________ to imagine how large the universe is. that是指示代词。为避免重复，可用 that 或 those 来代替前面已提到过的人或事物； The air in the countryside is fresher than _________in the city. The streets in the city are wider and the buildings are taller than ________ in the county. The environment is much cleaner than ________ in the city. The population of Shanghai is much larger than ______ of Nanning. What have scientists discovered? 2. Why is it impossible to imagine how large the universe is? They’ve discovered many other galaxies in the universe. Because they are very _________and their light ______travel for many years to reach us. The 3rd Para. Questions: far away has to Scientists have ______ spacships to the planet Mars to ____________. They have even sent spaceships to ______________ the solar system. However, no spaceship has travelled ___________ to reach other stars in our Galaxy. The 4th Para. sent take photos travel outside far enough Spaceships from the earth have done surveys of the other planets, but they have not found any life there. Why has no one from other planets tried to (4) _____________ with us? It is true that scientists have not discovered life on other planets in the (5)_________ yet, but some scientists believe that they will find it some day. Complete the passage with the words and expression in the box. communicate environment none solar system universe Is there life on other planets? There are seven other planets in our (1) ____________, but (2)______ of them has a(n) (3)______________ like that of the earth. solar system none environment communicate universe 1.成百万年 2.在其它的行星上 3.绕太阳转 4.他们中没有人 5.被叫做 6.太阳系 7.一小部分 8.几十亿的星星 9.在宇宙中 10.许多其他的星系 11.距离好远 12.不得不，必须 13.足够远 14. 如此多 15.和某人联系 millions of years on any other planets go around the sun none of them be called the solar system a small part of billions of stars in the universe m