It's________pleasure for me to be invited to play________piano at the concert．A.the，aB.a，theC.a，aD.a，/
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B解析分析：play the piano“弹钢琴”，表达弹奏乐器时，在乐器名称前面要用定冠词the，又如：play the violin(拉小提琴)(延伸)1)乐器不和play搭配时，就按名词的一般用法来考虑冠词问题，如：I bought a piano yesterday．The piano is very large．2)play和球类运动搭配时，球类运动名称前面不用冠词，如：play basketball，play football．