题干
——I'm going to Hainan on vacation next week.
——___________.
A：Have a good time
B：Not at all
C：Thank you
D：I have no idea
答案(点此获取答案解析）
A
——I'm going to Hainan on vacation next week.
——___________.
A：Have a good time
B：Not at all
C：Thank you
D：I have no idea
的递增区间是（ ）
