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

<上一题目录下一题>

热门试题

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

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