英语：unit4sectionwarmingupreading精品课件（新人教版必修3）.ppt

Unit 4 Astronomy: the science of the stars;一、根据课文内容，选择最佳答案;2.Why was it necessary for plants to grow before animals?______ A.Animals needed plants to protect them from the sun. B.Plants provided oxygen for animals to breathe. C.Animals could hide from hunters in forest. D.It was easier for plants to grow. 3.Why did dinosaurs disappear 65 million years ago?______ A.Because the earth was too hot for them to live on. B.Because there was no food for them to eat. C.Because the earth exploded at that time.; 4.Which is the correct order of the following animals appearance on the earth?______ 1.shell fishes 2.mammals;Para.;三、课文内容复述;plants began to appear on the surface of the water. They (8) _______________ (multiply) and filled the oceans and seas.Next, green plants began to grow on land.They were followed by land animals, from insects, amphibians to reptiles.After that, some huge animals developed and (9)________ (exist) on the earth for more than 140 million years.And then mammals appeared and gave (10)________ to young baby animals and produced milk to feed them.;四、概括课文大意(约 30 词); However, universe began; 拓展 in theory 理论上 in practice 实际上 运用 完成句子 Your plan is good ________________ (理论上), but it doesnt work ________________ (实际上)．;2．begin with 从……开始 典例 Mr Hawkings history class often begins with a story. 霍金先生的历史课经常以一个故事开始。;The earth became so violent that it was not clear whether; 运用 用 violent 的适当形式填空 ①After running, his heart beats ________. ② Some ________ scenes were cut from the film before it came to show. ③He was involved in the domestic ________.; They were in time to produce carbon, nitrogen, water vapour and other gases, which were to make the earths atmosphere.它们最终产生了碳、氮气、水蒸气和其他多种气体， 从而形成了地球的大气层。 4．in time (for sth./to do sth.) 及时；终于;拓展 on time 准时 at a time 每次；一次;运用 用 time 构成的短语填空 ①Please come in one ________________， not all together. ②They were just ________________ for the train. ③We can ask