搜搜做题作业网求助sat语法题！！！
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求助sat语法题！！！
(Unlike) several decades ago, today's librarians teach students to evaluate the accuracy and objectivity of online resources in addition to helping them find particular books.
A原句
B Unlike them of
C Unlike those of
D Contrary to
E Contrary to those
答案是C
请帮忙解释一下其他几个选项为什么不对。 尤其是B选项 。正确答案的those到底指什么？
(Unlike) several decades ago, today's librarians teach students to evaluate the accuracy and objectivity of online resources in addition to helping them find particular books.
A原句
B Unlike them of
C Unlike those of
D Contrary to
E Contrary to those
答案是C
请帮忙解释一下其他几个选项为什么不对。 尤其是B选项 。正确答案的those到底指什么？
contrary 是与什么什么完全相反；unlike 是表示不同于什么什么
根据整体意思可以判断，应该用 Unlike those 指的是 today's librarians 而不是 librarians 所以不用 them也可以根据字面意思，them是说人，those是说事。今时不同往日，不但说人，更强调的是整个事
根据整体意思可以判断，应该用 Unlike those 指的是 today's librarians 而不是 librarians 所以不用 them也可以根据字面意思，them是说人，those是说事。今时不同往日，不但说人，更强调的是整个事