21. It was terribly windy last night and there was _____ 18-degree drop in _____ temperature.
A. a;/ B. /;/ C. an;/ D. an; the
22. --Would you lend me $ 100 9 I need it to buy myself an MP3 player.
---_____.
A. What a pity B. That's right C. Nothing doing D. That depends
23. _____ that everyone present approves of the plan, it will come into effect from the new year on.
A. For B. Now C. Since D. Despite
