Lacking information about energy use, people tend to overestimate the amount of energy used by equipment, such as lights, that a

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问题 Lacking information about energy use, people tend to overestimate the amount of energy used by equipment, such as lights, that are visible and must be turned on and off and underestimate that used by unobtrusive equipment, such as water heater.

选项 A、equipment, such as lights, that are visible and must be turned on and off and underestimate that
B、equipment, such as light, that are visible and must be turned on and off and underestimate it when
C、equipment, such as lights, that is visible and must be turned on and off and underestimate it when
D、visible equipment, such as lights, that must be turned on and off and underestimate that
E、visible equipment, such as lights, that must be turned on and off and underestimate it when

答案D

解析 本句并列前后的形式是非常一致的,接近于perfect,类似我们在汉语中的说的“对仗工整”。根据第一章中的“公理”,可判定A、B、C中的that is/are visible是不简洁的,应换为visible equipment,这样既避开了is和are的争论,又呼应了后面unobtrusive equipment的形式。E中it指代不对,应该用that取代(可查阅第十一章替代部分的that、it的区别),同时when是多余的。
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本试题收录于: GMAT VERBAL题库GMAT分类
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