2. 外语
  3. By 2012, the modern use of electronic educational technology (also called e-learning) had grown at 14 times of the rate of tra

By 2012, the modern use of electronic educational technology (also called e-learning) had grown at 14 times of the rate of tra

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问题     By 2012, the modern use of electronic educational technology
(also called e-learning) had  grown at 14 times of the rate of traditional 【M1】________
learning. Open education is fast growing to become the dominant form
of education, for many reasons such as its efficiency and results compared to 【M2】________
traditional methods. However, cost of education has been an issue
throughout history and a major political issue in most countries today. Online
courses often can be expensive than face-to-face classes. Out of 182 colleges 【M3】________
surveyed nearly half said tuition for online courses were higher than that for 【M4】________
campus-based ones. Many large university institutions are now starting to offer
free or almost free full courses. It has been called the biggest change in the
way we learn for the beginning of the printing press. 【M5】________
    Despite of favorable studies on its effectiveness, many people still 【M6】________
desire to choose traditional campus education for social and cultural reasons.
The conventional merit-system degree is currently not common 【M7】________
in open education as it is in campus universities, although some open
universities do already offer conventional degrees. Presently, many
of the major open education resources offer their own form of certificate. 【M8】________
    Due to the popularity of open education, these new academic certificates
are raising more respect and equal status to traditional degrees. Many 【M9】________
open universities are working in offering students standardized testing 【M10】________
and traditional degrees and credentials.
【M5】
选项
答案for→since
解析 介词误用。分析句子结构可知，该句所用时态为现在完成时。介词for和since均可引出时间状语，for后接一段时间，强调动作或状态进行了多长时间，而since后接某一时间点，表示 “从……到现在为止”，强调时间的延续。the beginning of the printing press表示的是时间点，且根据句意 “这可以称作是从印刷机出现以来学习方式的最大变化”可知，此处应将介词for改成since。
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