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11. My brother often goes to scholl on......................................(feet) .

12. Nam is very (sport) .................................... . He plays many kinds of sports.

13. We should buy a(n)________________washing machine for convenience. AUTOMATION Reuse pollute fame

14. Instead of using plastic bag, we should use__________________bag.      

15. The air__________________causes breathing problems.                                           

16. Big Ben is the most____________________tower in England.                   

3. She lives in a village and its ___________ are peaceful.