单项选择题

Why does the author mention the history of tape recorders in the first paragraph

A．To inform readers of new inventions.
B．To lead into his following suggestion.
C．To give an example of his suggestion.
D．To show the importance of tape recorders
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单项选择题
Why does the author say it is impossible to make a mistake in the second paragraph
A．Because the tape shows your true love.
B．Because it's easy to use a tape recorder.
C．Because the music is what your parents like.
D．Because it's impossible to find a mistake in the book.
单项选择题
The underlined sentence in the third paragraph means ______
A．The golden years can make the old earn lots of money and receive good medical care
B．The old people in America are leading a hard life without good nutrition, medical care or housing
C．The old in America have to retire at the age of 65
D．American social security benefits are not good
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