Open educational resources are expected to______.
A．bring down the cost of textbooks
B．replace the role of the encyclopedia
C．help students improve their grades
D．popularize traditional textbooks

A.
A．bring
B.replace
C.help
D.popularize

【参考答案】

A
文章最后一段似乎告诉未来的出路在哪儿。开放的教育资源，如网上教材，有可能降低课本上的费用，甚至逐渐废除传统的课本。