题干
—Could I borrow your dictionary?
—___________, but you have to return it tomorrow.
A：I'm sorry
B：I'm not sure
C：No problem
D：I hope so
答案(点此获取答案解析）
C
—Could I borrow your dictionary?
—___________, but you have to return it tomorrow.
A：I'm sorry
B：I'm not sure
C：No problem
D：I hope so
满足
，则
的最大值为 （ ）
