问题描述：
Every year the American government r (1) thousands of inventions .Of these only a few become
p(2) and make a lot of money.There are thousands of inventions that n(3) wants.Here are some of those.In 1879,somebody invented a new type of “fire escape”.This was a special hat.With this hat on you could j(4) from a building on fire and float safely down.With it there was also there was also a special pair of shoes with rubber soles,so you could l (5) safely.There was a special
alarm clock for people who had p (6) waking up in the morning .This clock had sixty pieces of wood that hung a (7) your head.At the right time ,the pieces of wood d (8) down on you when you were sleeping.They h (9) you but did not hurt you .Therefore,you woke up.
Another invention was the bicycle seat to s (10) a thief.This seat had needles in it .When the o (11) rode the bicycle .the needles went down.But when the bicycle was not in u (12) ,
the needles were up.
p(2) and make a lot of money.There are thousands of inventions that n(3) wants.Here are some of those.In 1879,somebody invented a new type of “fire escape”.This was a special hat.With this hat on you could j(4) from a building on fire and float safely down.With it there was also there was also a special pair of shoes with rubber soles,so you could l (5) safely.There was a special
alarm clock for people who had p (6) waking up in the morning .This clock had sixty pieces of wood that hung a (7) your head.At the right time ,the pieces of wood d (8) down on you when you were sleeping.They h (9) you but did not hurt you .Therefore,you woke up.
Another invention was the bicycle seat to s (10) a thief.This seat had needles in it .When the o (11) rode the bicycle .the needles went down.But when the bicycle was not in u (12) ,
the needles were up.
问题解答：
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