21. — Here is some good news for you. You’ve won a holiday to the USA.
—______ That’s great!
A. Have I? B. Pardon? C. Congratulations! D. Good idea!
22. — How about ______ Christmas evening party?
— I should say it was ______ success.
A. a; a B. the; a C. a;不填 D. the; 不填
23. It is reported that the scientists in our county are______all possible ways to control H1N1 flu.
A. operating B. designing C. replacing D. exploring
