单项选择题

From the passage, we can infer that the first wood pulp mill in Canada ______.

A．turned out high-quality paper
B．used wood imported from the United States
C．caused a serious environmental problem
D．was a ready market for its product
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单项选择题
According to the speaker, libraries are facing the problem of ______.
A．books are in poor condition
B．having too many books from the early 1800s
C．not having enough space to store government documents
D．having to import most of the paper they use
单项选择题
Paper industry needed a new source of fiber in the early 1800s is because ______.
A．people wanted higher quality paper
B．paper made from rags deteriorated too quickly
C．wood pulp had become too expensive
D．the supply of rags was insufficient
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