单项选择题

When the writer says "it's very real" in the last paragraph (Line 2), he means ______.

A．production is very important
B．there are markets everywhere
C．selling a thing is a business
D．the market is a practical thing
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单项选择题
What can the market do for a person who produces goods
A．it tells him what to produce.
B．It provides him with what he needs.
C．It teaches him how to grow tomatoes.
D．it helps him to save his cost.
单项选择题
You are buying from the market when you ______.
A．borrow a book from the library
B．drive to the seaside for a holiday
C．look after your children
D．dine at a restaurant
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