28. —We’ll be back for our school’s ______ anniversary (周年) ceremony?
—I see. That means you’ll have a get together with your classmates in ________years.
A. twelve; seven B. twelfth; seven C. twelve; seventh D. twelfth; seventh
29. —You’ve been here _____ a month. Don’t you miss your parents?
—Yes, I plan to come back home _____ a month.
A. in, in B. for, in C. for, after D. after, after
