Cái này là nối cột số với cột chữ cho đúng ý nghĩa của từ nha =>
6. reuse a. to keep something to use in the future
7. reduce b. to give something to someone in exchange for something else
8. recycle c. to use something again
9. save d. to make something start working
10. wrap e. to make something less
11. swap f. to cover something completely in paper
12. turn on g. to make something stop working
13. turn off h. to treat waste materials so that they can be used again
6 - c
7 - e
8 - h
9 - a
10 - f
11 - b
12 - d
13 - g