21.----Susan, will you please go and empty that drawer?
----_______?
A. What for B. What is it C. How is it D. How come
22. The party last night was ____ success. We sang and danced until it came to__ end at 12:00.
A. a; an B. a; the C. the; an D. /; an
23. After the tsunami, many countries ______ plans to avoid the disaster.
A. put back B. put forward C. put aside D. put out