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[Sentence Correction]
试题详情
题目：
Nobody knows exactly how many languages there are in the world,
partly because of the difficulty of distinguishing between a language
and the sub-languages or dialects within it, but those who have tried
to count typically have found about five thousand.选项:
A、and the sub-languages or dialects within it, but those who have tried to count typically have found.
B、and the sub-languages or dialects within them, with those who have tried counting typically finding.
C、and the sub-languages or dialects within it, but those who have tried counting it typically find.
D、or the sub-languages or dialects within them, but those who tried to count them typically found.
E、or the sub-languages or dialects within them, with those who have tried to count typically finding.
答案:
A
提问：
老师您好，这道题我明白解题思路了，但还是不太懂为什么within对前面的a language，用within it而不是within them，句意说在一个语言和子语言、方言之间，为什么还用单数呢？这里是否有知识漏洞呀？
解答：
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提问：
老师您好，这道题我明白解题思路了，但还是不太懂为什么within对前面的a language，用within it而不是within them，句意说在一个语言和子语言、方言之间，为什么还用单数呢？这里是否有知识漏洞呀？
解答：
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阅读4617
提问：
选了B，还是请老师整体讲一下这题的思路吧
解答：
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阅读4647
提问：
这个within巴拉巴拉 到底说的是within谁里面？
解答：
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阅读4625
提问：
我选择了B 就it and them 这里指的是什么？
解答：
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阅读4619
提问：
不明白这题中的within it是什么意思，所以不知道到底是应该用it还是them。
C后半句是不是因为问候引导的句子是现在完成时，所以find也应该用完成时态。句子时态一致这个语法点是不是正确的呢？记得老师之前说过，要根据句意判断是否应该时态一致
解答：
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