单项选择题

A．Because publishers wanted higher quality paper.
B．Because paper made from rags deteriorated too quickly.
C．Because wood pulp had become too expensive.
D．Because the supply of rags was insufficient.
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单项选择题
A．Because he’ll have a visitor. B．Because he thinks he will go to his uncle’s first. C．Because he will have an appointment with his friend. D．Because he will be happy to go with the woman on Thursday.
A．Because he’ll have a visitor.
B．Because he thinks he will go to his uncle’s first.
C．Because he will have an appointment with his friend.
D．Because he will be happy to go with the woman on Thursday.
单项选择题
A．Did her work without the help of a computer. B．Went to the computer center for assistance. C．Waited until 9:30 for a computer. D．Asked her professor for advice.
A．Did her work without the help of a computer.
B．Went to the computer center for assistance.
C．Waited until 9:30 for a computer.
D．Asked her professor for advice.
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