15. A friend of.........is coming to stay with me next month
A. me B. my C. I D. mine
16. In the green future, vehicles will be powered by.........
A. solar energy B. coal C. gas D. fuel
17. Nuclear power...........in the future
A. will replace B. replaced C. will be replaced D. replace
18. The city is facing serious_________problems
A. polluted B. polluting C. pollute D. pollution
19. ''Hi, Bill. Congratulations!'' ''__________''
A. I'am sorry B. Thank you C. My pleasure D. You're welcome
20. Peter never goes to school late, ............he?
A. does B. did C. doesn't D. didn't