问题描述：
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 cooked
D.was cooked
问题解答：
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