1.
根据短文内容及首字母提示在空白处填上适当的单词,使短文意思完整。
Airplanes
are the newest kind of transportation. From early times, people tried to f through the sky like birds. About 100 years a, someone took the first ride on an
airplane. This ride lasted for less than one m. These first planes were very s, too. Only one o two people could fly in them at one time.
Today these p are very big and fast. H of people can travel in them at one time. W them, people can get f one side of the United States to the other in
less than one day. Traveling is very d from the way it was 100 years ago.