单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．50 years.
B．100 years.
C．200 years.
D．300 years.
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单项选择题
According to the passage, the railroad industry preferred steel to iron because steel was ______.
A．cheaper and more plentiful
B．lighter, and easier to mold
C．cleaner, and easier to mine
D．stronger and more durable
单项选择题
Th6 Norwegian Government would prefer that the oil industry should ______.
A．provide more jobs for foreign workers
B．slow down the rate of its development
C．sell the oil it is producing abroad
D．develop more quickly than at present
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