I

1, electricity

2, Unfortunately

3, daily

4, renewable

5, consumption

II

6, A -> Bỏ

7, B -> educated

8, B -> needed

9, A -> written

100, A -> should study

III

 11, B – The search for alternative sources of energy. (Cuộc tìm kiếm cho nguồn năng lượng mới)

12, C – water (dòng 6: “hydroelectric power provided one third of the electricity…”)

13, A – heat from the earth (năng lượng từ trái đất; địa nhiệt)

14, C – Synthetic fuels (Đến nay, quá trình tạo năng lượng từ nhiên liệu tổng hợp vẫn còn đắt đỏ -> chưa là một “alternative source of energy”)

15, B – They are expensive

16, D – Alternative energy will come from a variety of sources.

VI

17, He is the first man to leave the burning building.

18, The last student to leave the classroom must turn out the lights.

VII

19, Only a few of the movies shown at the National Theater are suitable for young people.

20, The couple living in the house next door are both engineers.