Train conductor：Excuse me，mama.Ticket，please.
Passenger：Sorry.I left it in the smoking section and I’ll go fetch it.
Train conductor：It’s OK，lady.（）.

76（）

A． within
B． at
C． through
D． to

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Passenger A: Excuse me, would you mind changing seats with me?Passenger B:（）Passenger A: Thank you. That’s very kind of you.

A． That's easy
B． Yes, I will
C． Not at all
D． I'd like to

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