题目内容
useful invention(发明) the computer is!
| A．What a | B．What an | C．How a | D．How an |
A
解析试题分析：感叹句主要有what和how构成：
1、what修饰名词或名词短语，有以下两种形式： 1. What+a(an)+（形容词）+单数可数名词+主语+谓语！或是：What+名词词组+主语+谓语！ 2. What+(形容词）+可数名词复数或不可数名词+主语+谓语！
2、How引导的感叹句。 how用来修饰形容词、副词或动词。其结构是：How+形容词（副词）+主语+谓语！
根据下文useful invention(发明)，中心词是名词invention，useful词首音素是辅音，故不定冠词用a，可知选 A。
考点：感叹句
点评：当how修饰动词时，动词不跟着感叹词提到主语之前。 what与how引导的感叹句，一般情况下可以相互转换，转换后意义不变。在口语中，感叹句的主语和谓语常常省略。
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| A．What an | B．What | C．How | D．How an |
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| A．How | B．What | C．What a | D．How a |
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| A．What an | B．How | C．What | D．What a |
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| A．What; so | B．How; such | C．What a; such an | D．How a; so an |
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| A．What a；a | B．How；the | C．What an; the | D．How an; the |
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| A．What | B．What a | C．How | D．How a |
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| A．How | B．How an | C．What | D．What an |
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| A．How | B．What an | C．How a | D．What |