单项选择题

Dawson was dissatisfied with soft iron pitons because ______. ( )

A．they were too soft to bear the climber's weight
B．they were the only pitons he could afford to buy
C．they coul not last long
D．they were made of iron

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单项选择题

Which of the following statements is true ( )

A．There are less opportunities today to start a business because customers are always dissatisfied.
B．There are many opportunities today to start a business with a simple reason.
C．Customers' dissatisfaction means you can start a business to satisfy them.
D．Never start a business if customers are dissatisfied.

单项选择题

Which of the following can best express the main idea of the passage ( )

A．Never be satisfied with what you have.
B．Start a business as a customer.
C．It is profitable to find fault with what you have.
D．To start a business is to make a fortune.