【題目】______ useful robot! It can help with the housework like a human servant.
A.What an
B.What a
C.What
D.How

【答案】B
【解析】句意：多么有用的機(jī)器人呀！根據(jù)句意及題干分析此題是考查感嘆句，空后中心詞是可數(shù)名詞單數(shù)robot，所以用what a（an）開(kāi)頭，useful開(kāi)頭發(fā)音是輔音，所以用不定冠詞a，故選B。

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