1. Of the many ways to protect our environment, using public transport is a good choice and avoiding buying ________ made of plastic is another.

2. Facial recognition technology is ________ used for payment. As a result, we don’t need to input the passwords any more.

3. — I usually walk for a while after supper every day.

— That’s good! Walking is a good ________ of exercise for both the young and the old.

5. We still need a large amount of information to ________ the survey because it involves a number of opinions from college students.

7. It’s very important for us to learn history. We can get experience from the past and ________ the same mistakes.

9. No ________ where they are, people come home to celebrate the Spring Festival with their families.

10. Our teacher is ________ for her fairness in grading students. All of us like her very much.

11. By the end of last year, the school football team had won a gold medal and three ________ ones.

12. When you visit another place or another country, take the time to learn the ________ customs and manners.

13. As we all know, using public ________ is necessary when we eat with others.

14. Every ________ has two sides. My bad luck has unexpectedly turned into a good thing.

15. Too much CO₂ causes the atmosphere to keep in too much ________. As a result, the Earth’s temperature is increasing.

Paper cuttings can be seen in many parts of China during the Spring Festival. The ancient people cut paper     16     animals or people.

A thousand years ago, paper cuttings were used for decorations (装饰). According to history books, women in the Tang Dynasty used paper cuttings as     17     headdresses (头饰). Paper cuttings are all made by     18    . It’s easy to learn. People only need a pair of     19     and paper. It can be one piece of paper or many pieces. The paper is usually folded before it is     20     with scissors. But if people want to make it more beautiful, they need different kinds of scissors and     21    . No mistakes can be made during the     22    .

The most common pictures are flowers, birds, and other animals and things about Chinese history. In the past, women in the countryside     23     together in their free time to make paper cuttings. Now fewer and fewer people learn this skill     24     there are some people who still do it. There are factories for paper cuttings in China. The paper cutting also     25     in cartoons, on stages and in magazines. It has changed into a kind of art.