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1. 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 heaters. (A) equipment,such as lights, that are visible and must be turned on and off andunderestimate that (B) equipment,such as lights, that are visible and must be turned on and off and underestimateit when (C) equipment,such as lights, that is visible and must be turned on and off and underestimateit when (D) visibleequipment, such as lights, that must be turned on and off and underestimatethat（D） (E) visibleequipment, such as lights, that must be turned on and off and underestimate itwhen
答案是D，就是有个疑问，同一句话里怎么能出现两个that做不同的成分呢？请教大家啦！ | 
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发表于 2013-7-25 11:34:10
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