19. ____ a reply , he decided to write again .

　　 A . Not receiving　　　　　 B . Receiving not

　　 C . Not having received　　 D . Having not received

18. There’re so many kinds of tape recorders on sale that I can‘t make up my mind ____ to buy .

　　 A . what　　 B . which　　 C . how　　 D . where

17. I would appreciate ____ back this afternoon .

　　 A . you to call　　 B . you call　　 C . your calling　　 D . you‘re calling

16. - I usually go there by train .

　　 - Why not ____ by boat for a change .

　　 A . to try going　　 B . trying to go　　 C . to try and go　　 D . try going

15. Little Jim should love ____ to the theatre this evening .

　　 A . to be taken　　 B . to take　　 C . being taken　　 D . taking

14. John was made ____ the truck for a week as a punishment .

　　 A . to wash　　 B . washing　　 C . wash　　 D . to be washing

13. - The light in the office is still on .

　　 - Oh , I forgot ____ .

　　 A . turning it off　　 B . turn it off　　 C . to turn it off　　 D . having turned it off

12. I can hardly imagine Peter ____ across the Atlantic Ocean in five days .

　　 A . sail　　 B . to sail　　 C . sailing　　 D . to have sailed

11. The secretary worked late into the night , ____ a long speech for the president .

　　 A . to prepare　　 B . preparing　　 C . prepared　 　D . was preparing

10. This sentence needs　　　　　　　 .

　　 A. improvement　　 B. improved　　　 C. improving　　 D. improved