---Miss Jones once _______ music _______ at Bardon School for two years and is now an actress.---No wonder I often hear her sing in the garden.A.had taughtB.has been teachingC.is teachingD.taught
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D解析当句中用了for+时间状语时用完成时连用，描述延续状况，但如果表示与现在毫无关系的过去某段时间的经历时用一般过去时，比如“我在农村生活过五年”，I once lived in the country for 5 years，过去完成时表述“过去的过去”，不适合本句。