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题库 / GMATLA-SC-57
According to analysts, an alliance between three major personal computer companies and most of the nation's largest local telephone companies would enable customers to receive internet data over regular telephone lines with speeds much higher than is currently possible.
with speeds much higher than is
with speeds that are much higher than are
at much higher speeds as are
at much higher speeds than that
at speeds much higher than are
题目分析：
本题主要考查考生对于比较中省略现象的理解。
选项分析：
选项A：由于speeds是复数名词，所以应该将本选项中最后一个be动词改为复数动词are。
选项B：至少，本选项应改为：
speeds that will be much higher than are currently possible
这是因为，速度应该是在未来更高，而不是现在更高。
选项C：习语有误，more + than为习惯表达，不能用more + as。
选项D：speeds是复数名词，不能用单数代词that指代。
选项E：Correct. 本选项在语法和逻辑上均是正确的。
at speeds（that will be）much higher than （speeds that）are currently possible
at speeds（that will be）much higher than （speeds that）are currently possible
c，higher和as不idiomatic
d，该选项的比较重心在动作上，而不是在speeds上，因此比较标志higher放在了介词短语at higher speeds里，而不是speeds的定语从句里，所以不能拿一个句子和that（speeds）相比，在d的基础上，可以有正确答案would enable customers to receive internet data over regular telephone lines a tmuch higher speeds than customer could do currently and possibly.
e，比较对象正确
关于D的解释，手动点个赞！
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at speeds（that will be）much higher than （speeds that）are currently possible
D. 错误一：speeds复数，不能用that指代。错误二：前半句receive at higher speeds强调动作，后半句应该是speeds that are currently possible强调名词speed，错误比较
选项B：至少，本选项应改为：
speeds that will be much higher than are currently possible
这是因为，速度应该是在未来更高，而不是现在更高。
选项B：至少，本选项应改为：
speeds that will be much higher than are currently possible
这是因为，速度应该是在未来更高，而不是现在更高。
at speeds（that will be）much higher than （speeds that）are currently possible
两个时间点的比较，需要补出动词，体现时间上的差异
at speeds（that will be）much higher than （speeds that）are currently possible
比较对象是speeds；
B时态错，要用将来时与than后面的现在时区分；且用定语从句修饰speed没有E选项简洁
选项D：speeds是复数名词，不能用单数代词that指代。
该选项的比较重心在动作上，而不是在speeds上，因此比较标志higher放在了介词短语at higher speeds里，而不是speeds的定语从句里，所以不能拿一个句子和that（speeds）相比，在d的基础上，可以有正确答案would enable customers to receive internet data over regular telephone lines a tmuch higher speeds than customer could do currently and possibly.
选项D：speeds是复数名词，不能用单数代词that指代。
#转某位大神考友
d项
该选项的比较重心在动作上，而不是在speeds上，因此比较标志higher放在了介词短语at higher speeds里，而不是speeds的定语从句里，所以不能拿一个句子和that（speeds）相比，在d的基础上，可以有正确答案would enable customers to receive internet data over regular telephone lines at much higher speeds than the customer could do currently and possibly.
这个大神好像是不太懂
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做题的时候看到前面没有be动词，所以排除了than后面带are的选项。这里应该是省略了that will be。B选项要判断句子的逻辑意思，不能是现在比现在更高。
at speeds much higher than (speeds) are currently possible.
B比较放在从句里，至少应该改为speeds that will be much higher than are currently possible
这是因为，速度应该是在未来更高，而不是现在更高。will使比较前后都有一个时间限定。
E对是因为变成了状语比较，前面的would已经提供了一个未来的时间限定。
答案E: at speeds much higher than speeds are currently possible.
speeds that will be much higher than are currently possible
that→指代单数名词；
currently possible可以指省略了名词的currently possible speeds,
that只能指代单数名词，复数名词用those；which可以指代复数名词
我个人觉得d选项不仅仅只是代词those和that的问题
因为题干的动词时enable，enable with有歧义，而且receive sth with a higher speed肯定不如receive sth at a higher speed好，所以ab都可以直接排出了，但ab还有其他错误：
a，with speeds much higher than（speed that） is，省略了speed that，因此用该用are而不是is；
b，with错的情况下还有太多冗余部分了，比如speed后的that are；