单选题 Billie Holiday's reputation as a great jazz-blues singer rests on her ability ______emotional depth to her songs.
【正确答案】 D
【答案解析】解析：本题考查ability的固定搭配。空前的ability与动词不定式连用后构成固定搭配，ability to do sth．意为“有做某事的能力”。