The word “this” in paragraph 2 refers to __________.
Lời giải tham khảo:
Đáp án đúng: C
Thông tin: p until the 18th century most people travelled by sailing boat, horse or stagecoach, but in 1769, there was a major breakthrough when the Scottish inventor James Watt invented the steam engine. 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.
Vậy đáp án đúng là C