22. This is your book, George. Maybe I left _____at home.
A. my B. mine C. I D. me
23. They arrived in Beijing ________the night of last Sunday.
A. of B. at C. to D. on
24. Put on your coat, ______you will catch a cold.
A. and B. but C. or D. so
25. --______have you stayed in that city?
--For about two years.
A. How long B. How much C. How old D. How far
