高中英语《Unit 4 Wildlife protection》Using Language课文语法填空 新人教版必修21

Unit 4 Wildlife protection Using Language Animal Extinction一、语法填空(根据课文内容完成短文）Many wild plants and animals have died out during the long history of the earth. And dinosaurs are the 1_ (much) famous of the animals. They came into being much 2_ (early) than humans. There were many different kinds of dinosaur. Eggs and bodies of dinosaurs 3_ (discover) in some places of China. However, dinosaurs died out suddenly. Maybe 4_ is because of a(n) 5_ (expect) incident 6_ a huge rock from space hit the earth. Maybe that the earth got too hot for the dinosaurs to live on any more caused their 7_ (extinct). No one knows 8_ sure why and 9_ dinosaurs disappeared from the earth in such 10_ short time. 参考答案：一、1. most 2. earlier 3. have been discovered 4. it5. unexpected 6. when 7. extinction 8. for 9. how 10. a