the singer told the rich woman that he ___already___downstairs.A has …sung B had…sung C did…sing D was…singing选哪个?为什么?

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the singer told the rich woman that he ___already___downstairs.A has …sung B had…sung C did…sing D was…singing选哪个?为什么?
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the singer told the rich woman that he ___already___downstairs.A has …sung B had…sung C did…sing D was…singing选哪个?为什么?
the singer told the rich woman that he ___already___downstairs.
A has …sung B had…sung C did…sing D was…singing
选哪个?为什么?

the singer told the rich woman that he ___already___downstairs.A has …sung B had…sung C did…sing D was…singing选哪个?为什么?
选b 完成时