【題目】The self-driving plane proves to be useful in many ways. ____ smart invention it is!

A.What aB.How aC.WhatD.How

【答案】A

【解析】

句意：事實證明，自動駕駛飛機(jī)在許多方面都很有用。這是多么聰明的發(fā)明啊！

考查感嘆句。在感嘆句中，what修飾名詞，how修飾形容詞/副詞，根據(jù)smartinventionitis可知句型結(jié)構(gòu)為：What +a/an+形容詞+單數(shù)名詞+主語+謂語動詞！smart以輔音音素開頭，不定冠詞用a。故選A。

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