单项选择题

Choose the fight order that shows the development of the tape recorder.

A．Using big rolls,
B．Using cassettes,
C．Using thin wire.A. a, b, cB. b, e, aC. c, a, bD. c, b, a
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单项选择题
What does the author advise us to do
A．To read a book to our parents in tbeir car.
B．To ask our parents to record a book.
C．To make a gift for our parents.
D．To practice reading out lou
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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