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 at speeds much higher than are currently possible.
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BrooklynPal 2014-10-11 13:09:29
at speeds (that will be) much higher than are currently possible....比较时态不同，一定要补充助动词。。。
chuster 2016-05-28 20:52:38
原句比较的是将来的speeds和现在的speeds，at speeds (that will be) much higher than (speeds that) are currently possible.不省略are是因为前面的speeds实际是将来的动作，如补全，应该为“will”等将来时态，比较前后如果时态不同，应补足助动词。 比较结构后面有只有be动词时，要知道省略了主语，而时态有所不同，所以不能省略be动词。
chuster 2016-05-28 21:06:41
一看到比较后面只有are等be动词就蒙了。。。
z764343128 2018-01-19 15:02:11
1. at speeds 固定搭配 2. 看than后面的结构，省略 (speeds) are currently possible
sue95 2017-02-17 01:45:14
E 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 at speeds much higher than are (speeds) currently possible 还原过来没有歧义，可以省主语不省谓语，非常灵活
mitangcifang 2016-12-02 12:38:35
原句比较的是将来的speeds和现在的speeds，at speeds (that will be) much higher than (speeds that) are currently possible.不省略are是因为前面的speeds实际是将来的动作，如补全，应该为“will”等将来时态，比较前后如果时态不同，应补足助动词。
gmat考得好 2016-11-22 19:19:28
应该是省略speed
在My9950213 2016-08-11 22:42:43
at speeds (that will be) much higher than (speeds that) are currently possible.比较前后若时态不同应补上助动词
沐雪漫 2016-07-20 14:59:46
at speeds (that will be) much higher than （speeds that）are currently possible
sylviaw2016 2016-07-07 13:08:27
1.有with独立主格没有at好 排除AB 2.看到that 想一想 单复数！speeds至少要用those 3.higher than不是as 4.时态不同，比较的时候be动词不要省略：原句比较的是将来的speeds和现在的speeds，at speeds (that will be) much higher than (speeds that) are currently possible.不省略are是因为前面的speeds实际是将来的动作，如补全，应该为“will”等将来时态，比较前后如果时态不同，应补足助动词。
sylviaw2016 2016-07-07 13:08:25
1.有with独立主格没有at好 排除AB 2.看到that 想一想 单复数！speeds至少要用those 3.higher than不是as 4.时态不同，比较的时候be动词不要省略：原句比较的是将来的speeds和现在的speeds，at speeds (that will be) much higher than (speeds that) are currently possible.不省略are是因为前面的speeds实际是将来的动作，如补全，应该为“will”等将来时态，比较前后如果时态不同，应补足助动词。
sylviaw2016 2016-07-07 13:08:23
1.有with独立主格没有at好 排除AB 2.看到that 想一想 单复数！speeds至少要用those 3.higher than不是as 4.时态不同，比较的时候be动词不要省略：原句比较的是将来的speeds和现在的speeds，at speeds (that will be) much higher than (speeds that) are currently possible.不省略are是因为前面的speeds实际是将来的动作，如补全，应该为“will”等将来时态，比较前后如果时态不同，应补足助动词。
Sparrow_7 2016-06-01 21:46:32
at speeds (that will be) much higher than are currently possible
