题目内容
单项选择(15小题，共15分)
1. (2015 •内江) Robert is good at playing piano although he is only 11-year-old boy.
A. /? the B. the; an C. a; / D. the; the
1. B
1. B 解析:play与乐器类名词连用时，名词前加定冠词the; 11-year-old是以元音音素开头的复合形容词，因此其前面用不定冠词an。故选B.
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