Who might the man be? A.A doctor. B.A taxi driver. C.A flight attendant.
A.
B.
C.
C
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参考答案:
举一反三
【单选题】The Law of Supply and Demand If trade is to take place, at least two economic units must be involved (business, households, tradesmen, etc. ): One must have something to sell and the other must desire...