11. (Q) Choose the correct answer. You eat some fruit or vegetables every day, if you want to be healthy. A) should B) could C) mustn't D) shouldn't 12. (Q) Answer the questions. What should we do to use less paper? A) We should turn off the lights. B) We should use e-readers. C) We should recycle more. D) We should plant trees. 13. (Q) Answer the questions. What should we do to save forests? A) We should collect rainwater for our yards. B) We should plant trees. c) We should use e-readers. D) We should recycle more. 14. (Q) Put the words in the correct order. 1980. Sam's mother / read / e-books / in / couldn't A) Sam's mother read e-books couldn't in 1980. B) Sam's mother in 1980 couldn't e-books read. C) Sam's mother couldn't read e-books in 1980. D) Sam's mother e-books in 1980 couldn't read.