单项选择题

How long will they wait till the train leaves

A．22 minutes.
B．32 minutes.
C．12 minutes.
D．2 minutes.
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What will the man buy
A．The book with the signature.
B．A novel published six years ago.
C．A novel which costs 60 cents.
D．A nineteenth-century book.
单项选择题
According to the writer, Adam Smith’s mistake was in believing that division of labor ______.
A．inevitably led to economic development
B．was an efficient way of organizing work
C．increased the production of existing goods
D．was an important development in methods of production
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