21. _____ Chinese basketball player Yao Ming will probably return to the NBA if he can recover from _____ earlier injury.
A. 不填; an B. The; 不填 C. A; an D. The; the
22. — Sorry, Ann. I’m afraid that I can’t go to the magic show by David Copperfield with you.
—____. Who knows when he will be back here next time?
A. It doesn’t matter B. Do as you like
C. What a shame D. Take it easy
23. Once new difficulties _____ in our study, we should learn to use our brains to solve them.
A. rise B. arouse C. raise D. arise
24. Police are now searching for a woman who is reported to since the flood hit the area last Friday.
A. have been missing B. have got lost
C. be missing D. get lost
