Question

11.​................. are you doing? - I’m reading a book. A. Whom​B. Who​C. Whose​D. What 12. ................. coffee is this? – It’s mine. A. Who​B. Which​C. Whose​D. What 13. ................. of these problems are you most interested in? A. Who​B. Whom​C. Which​D. What 14. ................. do you know about this subject, and who taught it to you? A. Which​B. Who​C. What​D. Whom 15. ................. is responsible for the accident? A. Whose​B. Who​C. Which​D. Whom 16. ................. can be an excellent source of free, renewable energy for poor farmers. A. Turbine​B. Biogas​C. Solar panel​D. Bulb 17. The government has warned that Britain will face power ................. in the coming winters. A. coal​B. shortages​C. slogans​D. energy 18. Wind power is one of the earliest ................. sources of energy used by humankind. A. alternative​B. polluted​C. harmful​D. exhausted 19. Nobody can predict exactly when supplies of fossil fuels will be ................. However, we all know they quickly reduce in quantity. A. installed​B. polluted​C. harmful​D. exhausted 20.​Biogas can be used to ................. natural gas in cooking, heating, or electrical generation. A. use up​B. replace​C. pollute​D. install

Answer 1

11d
12c
13c
14d
15b

Answer 2

11 d

12 c

13 c

14 d

15 b