21. Suyu Senior High is in _____ charge of Mr. Zhang, that is to say, Mr Zhang is in _____ charge of Suyu Senior High.
A. the; 不填 B. 不填; the C. the; the D. 不填; a
22. I sat next to a girl______ name was Diana.
A. whose B. of which C. her D. its
23. My English ______ a lot, as I used English every day and spent an hour each day_____ English books in the library.
A. was improved; to read B. improved; reading
C. was improved; reading D. improved; read
