... / of c.for /of d.for /as 8.Why don’t we stay at home ____ a change? a.in b.for c.with d.as 9. This service is free ____ charge. a.off b.in c.of d.for 10. The purpose of the examination is ... the subject. a. try b. inspect c. prove d. test 11. Ask the watchman ____. a. whose is this car b. this is whose car c. whose car that is d. whose car is that 12. I must get my office ____ ... the work. - “Oh ____!” a. no, I did b. yes, I did c. no, I didn’t do d. yes, I didn’t 18. He was willing to explain the reason ____ his absence. a. for b. why c. of d. with 19. ____ unprepared...