• （ ）F Plants began to grow on dry land.

• （ ）G The earth was a cloud of dust.

• （ ）H Water appeared on the earth.

• （ ）I Shellfish and other fish appeared.

• （ ）J The universe began with a "Big Bang".

• （ ）K Clever animals with hands and feet appeared.

• （ ）L Mammals appeared.

Task 3 Post reading

After reading the passage, discuss the following questions.

1. Why was the earth different from the other planets?

2. Why is it wrong to show films with dinosaurs and people together?

【总结反思】

a cloud of energetic dust（具有能量的尘埃）, combine into...（合成......）, move around the sun（环绕太阳运转）, become violent（变得激烈）, the solid surface（固体表面）, explode loudly（猛烈爆炸）, in time（及时，最终）, produce the water vapor（产生水蒸汽）, make the earth's atmosphere（构成了地球的大气层）, cool down（冷却）, on the surface（在表面）, be different from...（与......不同）, go round the sun（环绕太阳运转）, disappear from...（从......消失）, stay on...（存留在......）, show one's quality（显现某人的特性）, dissolve harmful gases（分解，溶解有害气体）, become part of...（变成......的一部分）, develop life（发展生命）, grow in the water（在水里生长）, fill... with...（用......来填充......，充满了......）, encourage the development of...（鼓励......的发展）, millions of years later（几万年以后）, live on land（在陆地上生活）, live in the sea（在海里生存）, grow into forests（长成森林）, produce young（生出幼仔）, lay eggs（下蛋）, animals with hands and feet（长着手脚的动物）, spread all over the earth（遍布全世界）, develop new methods（发展了新的方法）, grow food（种植）, move around（迁徙）, go by（过去，推移）, take care of...（在意......，照看好......）, put...into...（把......带入，放入......）, prevent...from...（防止......做......）, escape from... into...（从......逃离到......）, become hot（变热）, depend on....（依靠，依赖，取决与......）, solve a problem（解决一个问题）

1.carbon, nitrogen, water vapour, and other gases

2.Water

3. At first, small plants began to appear on the surface of the water, they produce oxygen, which encouraged the later development of early shellfish and all sorts of fish.

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　　Post reading

　　Because the water remained on the earth.

　　Because dinosaurs died out long before human beings developed on the earth.