6. “ How many pages…………… so far?” a. have you studied b. did you study c. do you study d. had you studied 7. We are too late. The plane …………… off ten minutes ago. a. has taken b. took c. had taken d. was taken 8. “What a lovely boat” “I ……………half a year building this boat.” a. spend b. spent c. spending d. have spent 9. How …………since we …………school? a. are you left b. have you been have left c. were you left d. have you been left 10. I think John …………..tomorrow. a. would come b. come c. will come d. comes