【GMAT考满分语法SC题库】Some bat caves,like honeybee hives, have residents_真题_答案

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题目内容

Some bat caves,like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.

Aacting as sentinels and to sound 分析该选项
Bacting as sentinels and sounding 分析该选项
Cto act as sentinels and sound 分析该选项
Dto act as sentinels and to sound 分析该选项
Eto act as a sentinel sounding 分析该选项

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正确答案: B

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katerinaliu

gmat club 上expert说法我觉得有点道理

defending is parallel to scouting

acting and sounding are parallel to each other and modify \"defending the entrance\". How do the residents defend the entrance? acting as sentinels and sounding a warning at the approach of danger.

2015-12-02 20:32:05 IP属地：湖南举报

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jiangqz

你好，不知简体字你能不能看懂，我用英语解释：if you want to put comma btw acting&sounding, you will find that you deliberately divide these two actions, acting first, and then sounding, but you should notice that the orginal meaning is: the bat acting as sentinels and sounding a warning. The meaning is the action-sound a warning is because the action-acting as sentinels, so these two actions can not be divided.

2013-03-19 18:40:58 IP属地：浙江举报

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klater

我咋觉得用acting和sounding是修饰句子的主语Some bat caves呢，所以用不定式更好些吧？？

2013-09-06 15:36:51 IP属地：局域网举报

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Amman

Because the verb phrases used to describe the bats\' duties are governed by the phrase different duties such as, they should each be expressed in the present participial (or \"-ing\") form to parallel defending and scouting.Choices A, C, D, and E all violate parallelism by employing infinitives (to...) in place of participial phrases. In Ethe singular sentinel is not consistent with residents, and

2014-11-06 15:46:08 IP属地：北京举报

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知白

感觉你说得对

2016-07-25 17:39:01 IP属地：局域网举报

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zaoldyeckx

想請問一下為什麼acting as sentinels and sounding之間要有and連接呢此句有defending acting sounding scouting四個動詞為什麼不defending... ,acting.., sounding...and scouting就好了呢?謝謝

2013-03-19 14:21:15 IP属地：中国台湾举报

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zaoldyeckx

你好~谢谢你特地用英文解释感谢我看得懂简体字:-)你的意思是说题目原意是bat作为sentinel所以有了sound a warning的动作两者有连带关係如果加入and则会变成先后关係即改变原意吗?

2013-03-20 21:18:12 IP属地：中国台湾举报

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democoo

他是这个意思。两个动作是联动的，所以用and，逗号分隔的动词可以都是没关联的。

2013-03-25 00:38:49 IP属地：上海举报

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