【題目】In the afternoon, we have ________ music lesson for _________ hour.
A.a/a
B.a/an
C.an/a

【答案】B
【解析】句意：在下午，我們有一節(jié)一個(gè)小時(shí)的音樂(lè)課。A和an都是不定冠詞，修飾可數(shù)名詞單數(shù)形式，表示泛指一個(gè)……；an應(yīng)用于元音發(fā)音開(kāi)頭的單詞前。第一個(gè)空后的名詞是music，輔音開(kāi)頭，故用a；第二個(gè)空后的hour是元音/a/開(kāi)頭的，故用an。選B。

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