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15. (单选题) – Professor, this is Jack Black, my friend. – (本题4.0分)
A、 Jack, how are you?
B、 Yes, I know.
C、 You’re welcome.
D、 My pleasure.
A、 Jack, how are you?
B、 Yes, I know.
C、 You’re welcome.
D、 My pleasure.
参考答案