___ important air is to living things! a.what b.what an c.what a d.how

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___ important air is to living things! a.what b.what an c.what a d.how
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___ important air is to living things! a.what b.what an c.what a d.how
___ important air is to living things! a.what b.what an c.what a d.how

___ important air is to living things! a.what b.what an c.what a d.how
耐心详阅：
选【D】How
对于生物,空气是多么重要啊!
【教你以后怎样做这类题】：语法知识——感叹句
一、由感叹词what引导的感叹句.
1.① What+a/an+（形容词）+单数可数名词+主语+谓语!
② What+名词词组+主语+谓语!
如:What a fine day it is!
2.What+(形容词）+可数名词复数或不可数名词+主语+谓语!
如:What kind women they are!
What nice music it is!
二、由How引导的感叹句.（how用来修饰形容词、副词或动词.）
【1.How+形容词（副词）+主语+谓语!】
如:How hard the workers are working!
How clever the girl is!
How quickly the boy is writing!
2.How+主语+谓语!
如：How time flies!时光飞逝!
三、注意:
1.当how修饰动词时,动词不跟着感叹词提到主语之前.
如:How fast the runner runs!
2.how与what引导的感叹句中的第一种格式(单数名词)一般情况下可以相互转换,转换后意义不变.
如:What an interesting story it is!= How interesting the story is!
What a beautiful building it is!= How beautiful the building is!
3.在口语中,感叹句的主语和谓语常常省略.
如:What a nice present!（省略it is）
How disappointed!（省略she is或其它可作本句主、谓的词语）

耐心详阅：
选【D】How
对于生物，空气是多么重要啊！
【教你以后怎样做这类题】：语法知识——感叹句
一、由感叹词what引导的感叹句。
1.① What+a/an+（形容词）+单数可数名词+主语+谓语！
② What+名词词组+主语+谓语！
如: What a fine day it is!
2. What+(形容词）+可数名词复...

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耐心详阅：
选【D】How
对于生物，空气是多么重要啊！
【教你以后怎样做这类题】：语法知识——感叹句
一、由感叹词what引导的感叹句。
1.① What+a/an+（形容词）+单数可数名词+主语+谓语！
② What+名词词组+主语+谓语！
如: What a fine day it is!
2. What+(形容词）+可数名词复数或不可数名词+主语+谓语!
如: What kind women they are!
What nice music it is!
二、由How引导的感叹句。（how用来修饰形容词、副词或动词。）
【1.How+形容词（副词）+主语+谓语！】
如: How hard the workers are working!
How clever the girl is!
How quickly the boy is writing!
2. How+主语+谓语！
如：How time flies! 时光飞逝!
三、注意:
1. 当how修饰动词时，动词不跟着感叹词提到主语之前。
如: How fast the runner runs!
2. how与what引导的感叹句中的第一种格式(单数名词)一般情况下可以相互转换，转换后意义不变。
如: What an interesting story it is! = How interesting the story is!
What a beautiful building it is! = How beautiful the building is!
3. 在口语中，感叹句的主语和谓语常常省略。
如: What a nice present!（省略it is）
How disappointed!（省略she is或其它可作本句主、谓的词语）
希望帮助到你！

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选择a air是不可数 然后这个句子是宾语前置 所以选A

D
how+形容词/副词+主语+谓语
___ important （主语air）（系表结构 is to living things!）

___ important air is to living things! a.what b.what an c.what a d.how This is very important,___ ___? It is important to take indoor air pollution seriously. 英语二选一选择题.Air and water ( ) important.【is；are】 句型转换 The air today is very clean.The air today is ___ ___ clean. the information is important. 的感叹句the information is important.___ ___ information it is! 同义句转换：Which thing is the most important?He asked ___ ___ ___the most important. the air in the open air is very ___ many people like going there To learn English well is very important for us.改为同义句 ___ ___very important for us___ ___ ___ To keep healthy is very important.(改为同意句) ___ __To keep healthy is very important.(改为同意句)___ ___ very important to keep healthy. How important It is to limit air and water pollution 句子有错吗 Rice,air and water ( )all important for us is or are Water and air ( ) important.A.has B.is C.have D.are _____ important air is to living things!A.howB.what anC.what a D.what Clean air is important to good health.请问to good health是什么成分? But air is important in many other ways-ways that are not always widely know意思 Air is so important for us.We can not live________(with)it. how important air is to human being用what 还是how