题干
--- Thank you!
--- ________
A：Don't say that!
B：That's right.
C：That's all right.
D：It is a welcome.
答案(点此获取答案解析）
C
--- Thank you!
--- ________
A：Don't say that!
B：That's right.
C：That's all right.
D：It is a welcome.
，
，则
（ ）