more and more people in the world realize we need _____ environment free from pollution.谁能解释为什么填“an”我的意思是为什么不填the或什么都不……

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more and more people in the world realize we need _____ environment free from pollution.谁能解释为什么填“an”我的意思是为什么不填the或什么都不……
more and more people in the world realize we need _____ environment free from pollution.
谁能解释为什么填“an”
我的意思是为什么不填the或什么都不……

more and more people in the world realize we need _____ environment free from pollution.谁能解释为什么填“an”我的意思是为什么不填the或什么都不……
an是因为後面那个environment的字首是个元音(a,e,i,o,u),所以前面为了口语方便将a变成an.
後面的free from pollution是在形容那个environment,断句要清楚才好掌握句子
比较完整应该写成More and more people in the world realize we need an environment (which is) free from pollution.
但要注意的是,重点是那个字的开头如何发音,有些字虽然开头是元音字母,但是发音不是元音也不需要改成an,例如university,united,useful, usual, European.
有些则是辅音开头但是是元音发音,也需要改成an,例如hour, honest, honor.
以上个人意见.

e是元音，元音前＋AN
望及时采纳，谢谢

因为是一般元音。

因为e是元音字母，为了读的顺口，所以英国人，把前面的a变成an
元音字母为a,e,i,o,u 以后看到这些字母开头的单词，前面的a都要用an
还有一些第一个字母不发音，但第一个发音的字母为元音的词，前面的a也要用an，比如an hour, an honest person等我的意思是为什么不填the或什么都不填……...

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因为e是元音字母，为了读的顺口，所以英国人，把前面的a变成an
元音字母为a,e,i,o,u 以后看到这些字母开头的单词，前面的a都要用an
还有一些第一个字母不发音，但第一个发音的字母为元音的词，前面的a也要用an，比如an hour, an honest person等

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environment【C，U】n.
依照答案是形容一个无污染的环境，作为大的概念而可数。元音开头，用an

很简单啊因为 environment 是元音音素开头的单词啊这是一个宾语从句哦

Now,more and more people shop o______ more and more people,more后为什么不接形容词 Now more and more people like in the ___(suburb) Now more and more people own p---- computers now more and more people are(i )to write biogs There are a number of more and more people.为什么? more and more people 是可数的吗 Nowadays,more and more people _______ (love) singing karaoke. why more and more people own a home computer s____on line is more and more popular among young people Now more and more people r___ the importance of health English is ___ used by more and more people.(wide) why more and more people interesting in English? More and more people like her的中文意思 more and more American people ___(give) up smoking为什么? More and more people take pictures with the digital c_______. More and more people speak Chinese in the world .Chinese ______ ______ by more and more people in there will be more and more people 和there will have more and more people那个正确?