Question:
The word “this” in paragraph 2 refers to __________.
-
A.
steamboat -
B.
breakthrough -
C.
steam engine -
D.
inventor
Reference explanation:
Correct answer:
Information: p until the 18th century most people traveled by sailing boat, horse or stagecoach, but in 1769, there was a major breakthrough when the Scottish inventor James Watt invented the steam engine. Printed in 1783, the French inventor Claude de Jouffroy used this to build the first steamboat, and in 1804 the Englishman Richard Trevithick constructed the first steam-powered train.
The word “this” in paragraph 2 refers to steam engine.
So the correct answer is C
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