21. Living in _______ ever increasingly fast-paced world, we are facing greater competition, so
we must take _______ advantage of every opportunity to develop.
A. an; the B. an; 不填 C. the; an D. the; 不填
22. — Can you hand in your composition tomorrow?
— Sure. ________it handed in on time, I’ll stay up tonight.
A. Get B. Having got C. Getting D. To get
