问题描述：
首字母填空!HELP!
M_____of years ago,people looked at the f_____birds in the sky and they wanted to fly.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________.
M_____of years ago,people looked at the f_____birds in the sky and they wanted to fly.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________.
问题解答：
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