单项选择题

A．what
B．how
C．when
D．that
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单项选择题
Which was an important invention in the 19th century
A．Movies with sound.
B．Nylon.
C．The radio.
D．The computer.
单项选择题
Which one of the following categories does the speaker attach great importance to
A．Material fife.
B．Sports fife.
C．Spiritual life.
D．Working life.
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