单项选择题

The speaker mainly discusses ______.

A．the growth of the printing industry
B．the history of paper-making
C．the use of paper in the 19th century
D．the composition of wood fiber
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单项选择题
Which of the following is NOT mentioned by the speaker
A．Diamond-producing rivers are located near the mountain sides.
B．Diamonds couldn’t be formed without great heat and pressure of the volcano.
C．Volcano explosions brought some diamonds up to the surface of the earth.
D．Explosions of the volcano can damage diamonds as well.
单项选择题
Where was Sberrill going when Fill met her
A．To the supermarket.
B．To school.
C．To her home.
D．To work outdoors.
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