21．_________the examination will _________ easy.
A. Hopeful; become B. Hopefully; turn out
C. Be hoped; turn out to be D. Hoping; turn
22．_________ we know, Tom is sure to succeed in this competition.
A. So long as B. So far as C. So that D. Now that
23．I can hardly imagine Peter _________ across the Atlantic Ocean in five days.
A. sail B. to sail C. sailing D. to have sailed
