英语阅读理解3Dinosaurs (恐龙) lived on earth more than sixty million

英语阅读理解3
Dinosaurs (恐龙) lived on earth more than sixty million years ago. This was a long time before people existed（存在）.There were millions of dinosaurs, and they lived everywhere. Some were as small as chickens. Others were as big as ten elephants. Some dinosaurs had wings and could fly.
Many dinosaurs were harmless. They were as gentle as sheep and ate plants. Others were harmful. They were fiercer (更凶猛的) than tigers and ate meat, unlike most other dinosaurs.
Dinosaurs all died suddenly. Nobody knows why. We know about the lives of dinosaurs from the skeletons (骨架,骨骼), eggs and footprints they left behind.
True or False(判断下列句子是否符合短文内容,符合的用“T”表示,不符合的用“F”表示,填入括号内)：
（ ）1、Dinosaurs lived on earth long before man.
（ ）2、Sixty million years ago there were millions of dinosaurs on the earth.
（ ）3、Small dinosaurs were harmless while big dinosaurs were harmful.
（ ）4、Some dinosaurs looked like sheep and were gentle.
（ ）5、Dinosaurs disappeared suddenly on the earth for unknown reasons.
（ ）6、People now know about dinosaurs from the bones, eggs and footprints they left behind.