【題目】Bob is ________ eleven-year-old boy, but he knows a lot about the Internet.

A. an B. a C. the D. /

【答案】A

【解析】

試題分析：句意：鮑勃是一個(gè)11歲的男孩，但他知道很多關(guān)于互聯(lián)網(wǎng)的知識(shí)。eleven ['lev()n]以元音音素開頭，故前面用不定冠詞an，答案為A。

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