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关于GMAT SC中there be的使用,该题答案选B,不是说there be 表示某地自然存在着某物吗?

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关于GMAT SC中there be的使用,该题答案选B,不是说there be 表示某地自然存在着某物吗?
89.A recent national study of the public schools shows that there are now one microcomputer for every thirty-two pupils,four times as many than there were four years ago.
  (A) there are now one microcomputer for every thirty-two pupils,four times as many than there were
  (B) there is now one microcomputer for every thirty-two pupils,four times as many than there were
  (C) there is now one microcomputer for every thirty-two pupils,four times as many as there were
  (D) every thirty-two pupils now have one microcomputer,four times as many than there were
  (E) every thirty-two pupils now has one microcomputer,four times as many as
这道题的答案应该是C

A. there (are) now one microcomputer for every thirty-two pupils, four times (as many than) there were
B. there is now one microcomputer for every thirty-two pupils, four times (as many than) there were
C. there is now one microcomputer for every thirty-two pupils, four times as many as there were
D. (every thirty-two pupils now have one microcomputer), four times (as many than) there were
E. (every thirty-two pupils now has one microcomputer), four times as many as

“are”主谓不一致,排除A
“as many than”错误的idiom,应为“as many as”,排除B和D
C和E对比,E中four times的逻辑主语是pupils,拥有一台电脑的“学生数量”是四年前的4倍,而本题要表达的意思是人均拥有“电脑”的数量是四年前的4倍.语义逻辑和本题要表达的含义不相符.

解释there be:
这道题的考点不在于there be本身,考点在于主谓一致、as many as和句子整体逻辑.
there be 后接具体的名词,用来表达存在性,该题前述“研究表明”,后面用there be 表示一个存在的事实,没有问题.

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OG10 - SC89原题解释:
use the construction “one X for every thirty-two Y’s” to describe the ratio of computers to pupils,but only C,the best answer,is error-free.In A,are does not agree with the subject, one microcomputer; furthermore,in A,B,and D, than is used where as is required.Choices D and E reorder and garble the “one X...” construction,making four times as many refer illogically to pupils.