单项选择题

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

A．It’s a problem not yet solved.
B．It’s a question difficult to answer.
C．It’s a matter that is hidden or secret.
D．It’s a legend handed down from the past.
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填空题
Praise, if too much can lead to an unexpected effect opposite to out intention.
单项选择题
A．They don’t get rid of loose arm.B．They can damage arm muscles.C．They aren’t acceptable to most people.D．They can raise one’s blood pressure.
A．They don’t get rid of loose arm.
B．They can damage arm muscles.
C．They aren’t acceptable to most people.
D．They can raise one’s blood pressure.
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