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[Sentence Correction]
试题详情
题目：
Lacking information about energy use,people tend to overestimate the amount of energy used byequipment, such as lights, that are visible and must be turned on and off and underestimate thatused by unobtrusive equipment,such as water heaters.
选项:
A、equipment, such as lights, that are visible and must be turned on and off and underestimate thatequipment, such as lights, that are visible and must be turned on and off and underestimate it when
B、equipment, such as lights, that is visible and must be turned on and off and underestimate it when
C、visible equipment, such as lights, that must be turned on and off and underestimate that
D、visible equipment,such as lights,that must be turned on and off and underestimate it when
答案:
D
提问：
这个题的e选项，因为前面存在the amount of energy ，可以指代，所以放过，并且形式正好和前面对应。看d里面的underestimate that后面的that是做代词吗?记得上课讲，that 和those可以直接补充出后面的修饰对象，但this不能单独出现，那these可不可以单独出现呢?D，E里面有犹豫。
解答：
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提问：
想请金栩竹老师看看我的做题思路的问题，我错选了E。根据后面的unobtrusive equipment 锁定在DE两个选项，再比较it和that，我认为that是指前面的energy used by visible equipment 有特指的意思，但这里应该只是energy，所以觉得it更好，这个区别我好像是从有道题上看到的，但这里好像错了。想请老师讲解一下it和that在句子中的区别和意义，谢谢！
解答：
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提问：
这个题的e选项，因为前面存在the amount of energy ，可以指代，所以放过，并且形式正好和前面对应。看d里面的underestimate that后面的that是做代词吗?记得上课讲，that 和those可以直接补充出后面的修饰对象，但this不能单独出现，那these可不可以单独出现呢?D，E里面有犹豫。
解答：
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提问：
这道题可以直接杀AB，选了C，没什么思路。希望老师解答一下。谢谢
解答：
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