34. Lackinginformation about energy use, people tend to overestimate the amount of energyused by [url=] equipment[/url] , such as lights, that are visibleand must be turned on and off and underestimate that [AE1] used by unobtrusive equipment, such aswater heaters. [url=](A) equipment,such as lights, that are visible and must be turned on and off andunderestimate that [/url] [url=](B) equipment,such as lights, that are visible and must be turned on and off andunderestimate it when[/url] [url=](C) equipment, such as lights, that is visible andmust be turned on and off and underestimate it[/url] when (D) visible equipment, such as lights, that must beturned on and off and underestimate that (E) visibleequipment, such as lights, that must be turned on and off and underestimate [url=]it when[/url]
Parallelism; Agreement
[AE2]“that are” doesn’t agree with the single subject “equipment”; “thatare visible” is not parallel to “unobtrusive”
[AE3]“that are” agreement problem; “that are visible” parallelproblem;”it when used by” is not parallel to “the amount … used by”.
[AE4]The same problem as B
[AE5]“it when used by” is not parallel to “the amount … used by”
我对比了D和E,最后选了E,认为it指代the amount use of energy,underestimte it when used by U的意思是when used by U, people tend to underestimate the amount use of energy 为什么that可以和the amount of energy平行,it when不可以? 解释:The key point to remember is that when we are referring to the "something" that was mentioned earlier, then we must use "it" and when we are referring to the something similar or copy of that "something" then we must use "that".
In the above question, "it" will refer to the "amount of energy used by visible equipment" whereas "that" will refer to just "amount of energy".
it指代的是前文出现的,一模一样的东西 that指代和前文出现的同类的东西,“副本”,但是不同一个东西 本题中,the amount of energy used by E和the amount of energy used by U不是同一个东西,所以不能用it
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