【題目】We saw _____ UFO in the sky a week ago. It was _____ unusual thing.

A. an; an B. a; an C. a; a D. an; a

【答案】B

【解析】

試題分析:句意為:一個(gè)星期以前我在天空中看見(jiàn)一個(gè)不明飛行物。那是一個(gè)不尋常的東西。結(jié)合選項(xiàng)可知,本題考查的是冠詞的用法。在英語(yǔ)中,a和an均用于單數(shù)可數(shù)名詞前,表示泛指“一個(gè)”。a用于輔音開(kāi)頭的詞前,an用于元音開(kāi)頭的詞前。the表示特指,尤其指上文提到的人或物,還用于序數(shù)詞和最高級(jí)形容詞前。根據(jù)語(yǔ)境,這里指的是泛指“一個(gè)”,UFO為輔音開(kāi)頭,unusual為元音開(kāi)頭。應(yīng)選B。

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