题目

M____of years ago,people looked at the f__ birds in the sky and thay wanted to fiy.They tried
many different w__to fly.First,they made wings f___pieces of paper.Then they put these wings on and jump off a hill into the a__.

提问时间：2020-08-13

答案

Millions of years ago,people looked at the flying birds in the sky and thay wanted to fiy.They tried
many different ways to fly. First,they made wings from pieces of paper.Then they put these wings on and jump off a hill into the air.