【題目】Mary began to play ________ guitar at the age of seven.

A. a B.the C./

【答案】B

【解析】

試題分析：句意：瑪麗在七歲開始練習(xí)吉他。此題考查冠詞，固定短語play +the+樂器類，根據(jù)句意，應(yīng)選B。

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