单项填空
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. I am _______ about what I say because careless remarks are likely to hurt others’ feelings.
A. enthusiastic B. concerned C. doubtful D. cautious
23. — That must have been a terrifying experience.
— Yeah. I _______ in the damaged car, unable to move.
A. was stuck B. have been stuck C. am stuck D. had been stuck
24. Billy Crystal hosted the Academy Awards again this year, and his talks always ________ the expectation of most audience.
A. put up with B. end up with C. live up to D. add up to
