----- Nội dung dịch tự động từ ảnh -----
20. We
C. waste
doesn't get
too much electricity at the moment.
B. have wasted
C. is not getting
D. not get
C. are wasting
D. to waste
Ex 14. Read the passage carefully and choose A, B, C or D to indicate the best answer to the questions.
Solar energy is a long lasting source of energy which can be used almost anywhere. To generate solar energy, we
only need solar cells and the sun! Solar cells can easily be installed on house roofs, so no new space is needed and each
user can quietly generate their own energy. Compared to other renewable sources, they also possess many advantages.
Wind and water power rely on turbines which are noisy, expensive and easy to break down. Solar cells are totally silent and
non-polluting. As they have no moving parts, they require little maintenance and have a long lifetime.
However, solar energy also has some disadvantages. We can only generate solar energy during daytime because
the system depends on sunlight. Besides, solar cells require large area to work effectively. The main disadvantage of solar
energy is that it costs about twice as much as traditional sources such as coal, oil, and gas. This is because solar cells are
expensive. Scientists are hoping that the costs of solar cells will reduce as more and more people see the advantages of this
environmentally friendly source of energy.
1. What does the passage mainly discuss?
A. Advantages and disadvantages of solar energy.
C. The cost of solar energy.
2. What does the word they in line 4 refer to?
A. solar energy users
B. Solar energy's advantages over other sources of energy.
D. Solar energy as an alternative for fossil fuels.
B. other renewable resources
C. advantages.
D. solar cells
C. coal
D. gas
3. Which of the following is NOT a traditional source of energy?
A. solar energy
B. oil
4. Which of the following is the main disadvantage of solar energy mentioned in the passage?
A. It is expensive.
C. It is unfriendly to the environment.
5. What does the word advantages in line 13 mean?
A. very bad
B. resources
Ex 15. Fill in the blanks with the best option
B. Solar cells require large areas to operate.
D. It depends on sunlight.
C. benefits
D.friendly