premise：Recent studies have found that, in the United States, people who own computers watch, on average, significantly less television than people who do not own computers.
DE是在否认前提
这个里面是speeds的比较:an alliance...would enable customers to receive ...at speeds much higher than are currently possible.
--> an alliance...would enable customers to receive ...at speeds much higher than [speeds( that are) currently possible].
省略了speeds that,只保留了are
类似的，prices are higher than we expected.
--> prices are higher than (prices that) we expected
so...as to..." in general, you don't use so ADJ as to VERB unless the VERB describes some sort of state/condition. (i.e., if the verb is an action verb, this construction generally isn't used.)
....so as to...." there should be no change of subject, and so there's an implication that the subject is the same as the subject of the previous clause/action.
so that..." the construction is placed in front of a clause that describes the intention or goal of some action. ("X ... so that Y..."就理解为Y是X这个action的intention or goal!)
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Which of the following can be properly concluded from the statement--》必须是must be true的一个statement！