( )21. We live in this society now ________ literally someone is always helping.
A. when B. where C. that D. what
( )22. The maple trees turn a brilliant red in autumn, adding another ________ to the colors in the harvest season.
A. theme B. version C. category D. dimension
( )23. Patrick waited ________ all the luggage was cleared, but his never appeared.
A. until B. before C. when D. while
( )24. —Look! Mary is crazily looking for something again!
—________， she can't find her keys.
A. Typically B. Occasionally C. Accordingly D. Particularly
( )25. Cambridge gave a positive answer ________ inquiries on whether it recognizes gaokao scores.
A. in favor of B. in response to C. in salute to D. in consequence of
( )26. Wild animals in nature reserves need to develop their survival skills and ________ their wild nature.
A. display B. possess C. maintain D. monitor
( )27. I'd never wondered before whether or not he was kid－friendly. With one glance, I quickly ________ that he probably wasn't.
A. agreed B. reported C. explained D. decided
( )28. The same boiling water softens the potato and hardens the egg. It's about ________ you're made of, not the circumstances.
A. that B. what C. how D. who
( )29. —Excuse me, do you mind if I open the window?
—Well, if you ________ I can put on more clothes.
A. can B. may C. must D. shall
( )30. With the number of homecoming overseas students ________ up in recent years, the attraction of foreign degree holders has gradually faded.
A. shot B. being shot C. shooting C. to shoot
( )31. —Have you heard that they are working around the clock to compete for the prize?
—Don't worry. We are ready to ________ the challenge.
A. build up B. take up C. stick to D. lead to
