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Đáp án: B
Giải thích: Dựa vào câu: “They walked or rode horses for short trips. They took trains or boat for long trips”.
Dịch: Họ đi bộ hoặc cưỡi ngựa khi đi đường ngắn. Họ bắt tàu hoả và thuyền cho đường dài

II. Read the passage and complete the sentences. True (T) or false (F).
Air pollution is a serious problem in many cities. Motor vehicles, factories and other sources create so much air pollution that it may hang in the air like dirty fog. Air pollution threatens the health of the people who live in cities. City wastes cause water pollution when they are poured into the waterways. These wastes kill fish and make some areas unfit for swimming. In addition, many large cities have difficulties in disposing of their garbage. The amount of garbage grows each year, but places to put it are quickly filling up. Citizens, governments, industries, scientists, and business people must work together in different ways to gradually reduce pollution. For example, most cities have introduced recycling programmes.
¨ 1. Motor vehicles and factories are among some sources of air pollution. T
¨ 2. Air pollution doesn’t endanger people’s health in some cities. F
¨ 3. Air pollution is the only problem of the environment mentioned in this passage.F
¨ 4. Garbage disposal is a problem in many large cities.T
¨ 5. Everyone must cooperate to reduce pollution.T
6. We can reduce pollution by recycling programmes only. F

. 1. Where was Alexander Graham Bell born ?
In Scotland
2. Where did he emigrate first ?
He emigrated to Canada first
3. Who did Bell work with at Boston University?
Thomas Watson
4. What did Bell invent ?
The telephone
5. Did Bell conduct many experiments in America?
Yes, he did
6. Where did he successfully demonstrate his invention?
At the countless exhibitions
Đáp án: B
Giải thích: Dựa vào câu: “Before the airplane was invented, most people traveled by cars, boats, and trains.”.
Dịch: Trước khi máy bay được phát minh, hầu hết mọi người đi lại bằng ô tô, tàu thuyền và tàu hoả.