9. When we go out, my dad always carries the _________ bag of all.   A. heavy         B. heavier                   C. heaviest

10. I’m writing _________ poem. _________ poem is about 3Rs.  A. a/ The                    B. a/ A                        C. an/ The

11. Fansipan Peak is ________ than Son Tra Mountain.         A. more high              B. higher                    C. highest

12. When you create new products from used materials, you are ____.  A. recycling                B. reducing       C. reusing

13. My home robot can _________ clothes for me.                     A. plant                      B. water                     C. iron

14. When I have free time, I like to _________ the Internet.           A. go                          B. surf                       C. play

15. In the future, robots can work as a _________ to keep our house safe.   A. watch      B. guard                     C. viewer

16. If you come to Vietnam, don’t forget to try its_________ street food.        A. tasty     B. easy                     C. helpful

17. Oh no, these are my pencils. _________ are over there!      A. You                        B. Your                      C. Yours

18. Kate: How ___________ do you play computer games? - Nick: Two or three times a week.

A. often                      B. many                      C. long