Ⅴ. 单项填空（共15小题； 每小题1分，满分15分）
21. －Linda, help _______ to some fruit. －Thank you.
A. you B. yours C. yourself D. yourselves
22. －Where is Mrs. Wilson?
－I saw her in the library _______. I’m not sure if she is still there.
A. right now B. just now C. at once D. so far
23. －When you have difficulty in English learning, you can ________ Mrs Brown for help.
－Ok, I will.
A. turn off B. turn up C. turn over D. turn to
