单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．Forty hours.
B．Less than forty hours.
C．About seventy hours.
D．Less than twenty-five hours.
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单项选择题
What does“give it a go”in Paragraph 5 mean
A．Let it go.
B．Go outside.
C．Set up a goal.
D．Have a try.
单项选择题
A．It preserves the vitamins.B．It breaks down the vitamins.C．It makes the meat easier to digest.D．It reduces the protein content.
A．It preserves the vitamins.
B．It breaks down the vitamins.
C．It makes the meat easier to digest.
D．It reduces the protein content.
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