阅读理解。 In the past, all letters were sent by train or by ship. Now most

题文

阅读理解。     In the past, all letters were sent by train or by ship. Now most letters still go by ship or by train, but some
are sent by air. You send a letter by air so that your friend may receive it sooner. A letter takes about twelve
days to go from England to India by train and by ship. A letter can get to India by air in five days now, but
soon the time may be made shorter. At first, people were afraid to send letters by air. They thought that the
plane may fall and their friends may not receive the letters. So they sent two letters, one by air and the other
by train or ship. They wanted to make sure that the letter would be received. Planes are now almost as safe
and sure as trains or ships. More and more letters are sent by air. 1.Many years ago people sent all letters _____.  

[     ]

[     ]

A. as fast as
B. much slower than
C. not as safe as
D. faster than

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答案

1-5  ABCDC

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