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While Morgan was running his businesses he was also working on inventions. In 1914
he patented a device that he (21)_
the Morgan safety hood and
smoke protector. A patent is an official document that gives an inventor control over (22)
may use their invention. The safety hood was an early gas mask.
A gas mask allows people to breathe in (23)
where there is a lot of smoke
84
or dangerous chemicals in the air. In 1916 an explosion trapped some workers in a gas-
filled tunnel under Lake Erie. Morgan attracted (24)_
attention when
he used the safety hood to rescue some of the workers. In 1923 Morgan patented another
safety invention. This was a T-shaped traffic signal. It (25)_
_moving
arms that told traffic when to stop and go. It was not the first traffic signal, but it controlled
traffic better than many existing signals.
Morgan died on August 27,1963, in Cleveland. After his death several schools were
named for him.
21. A. considered B. called
22. A. who
23. A. opportunities
24. A. wide
25. A. possessed
B. whom
B. chances
B. broad
B. included
c. knew
C. what
C. conditions
c. widespread
c. had
D. regarded
D. which
D. situations
D. extensive
D. got