Thank you. I was wondering about #7...

11. Fossil fuels are becoming (exhaust) exhausted while the world's demand for energy is increasing.

12. Wind energy is abundant and (limit) unlimited, however is it not always available.

13. Sometimes the staff in that shop are very rude and (polite) impolite.

14. Air water and soil are necessary things to our (survive) survival.

15. Water power provides energy without ( pollute) pollution.

16. You are old enough to take ( responsible) responsibility for what you have done.

17. Life ( expect) expectancy of people around the world has increased dramatically.

10. Roses are often considered to __________ love.

A. symbol                        B. symbolize                              C. symbolization              D. symbolic

11. The One Pillar Pagoda is a place of __________ in Hanoi.

A. activities                      B. routine                        C. interest                        D. hobbies