By the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cookeBy the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cookedD.was cooked

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Bythetimemyparentsreachedhomeyesterday,I_thedinner.A,hadcookedB.cookedC.havecookeBythetimemyparentsr

By the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cookeBy the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cookedD.was cooked
By the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cooke
By the time my parents reached home yesterday,I _ the dinner.
A,had cooked B.cooked C.have cooked
D.was cooked

By the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cookeBy the time my parents reached home yesterday,I _ the dinner.A,had cooked B.cooked C.have cookedD.was cooked
过去完成时,A