Dùng các từ có sẵn trong khung điền vào chỗ trống được đánh số từ 14 đến 19: which, better, keeping,changes, role, nothing. Our environment is in trouble, which is caused by modern ways of living and today’s industries. Most people think there is (14)_____ they can do. This is not true. Everyone can do something to help save the environment. Firstly, we can make simple (15)_____, like shopping with reusable bags and (16)_____ food and other items in reusable containers. Recycle all your cans, bottles and paper. There should be a recycling centre somewhere near your home, so take them there. Next, we can also save the environment by planting trees, (17)_____ is a favourite Earth Day activity. Trees play an important (18)_____ in keeping our air clean by releasing oxygen into the air and trapping carbon. The more trees we have, the (19)_____ our air quality is, and that's why planting trees is an excellent step to take toward saving the environment. b. Các câu sau đây đúng (Đ) hay sai (S) so với nội dung đoạn văn? 20. Modern ways of living and today’s industries is polluting our environment. 21. We can do nothing to save the environment. 22. Trees can keep our air clean by releasing oxygen into the air and trapping carbon.