20. With just four years _______, the London Olympic organizers have promised to deliver an equally inspirational ceremony.
A. going B. go C. gone D. to go
19. Tony, mind your manners. Don’t _______ while others are talking.
A. cut in B. cut off C. cut down D. cut up
18. ________ seems to be no possibility _______ the shy girl can win the first prize in the contest.
A. There; that B. It; that C. There; whether D. It; whether