21. —See red handbag on the table? Is that yours?
—No. Mine is pink one
A. a; the B. the；不填 C. the; a D. 不填；a
22. Before writing your answer, please give careful _． to the question
A. expression B. translation C. consideration D. examination
23. The conference last week ______ so successful without the efforts of all the volunteers from the local high schools.
A. will not be B. would not have been C. would not be D. can not be
