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题目内容
（郑州工程技术学院-大学英语1）
When Lily came home at 5 p.m. yesterday, her mother ______ dinner in the kitchen.
(A)cooked
(B)was cooking
(C)cooks
(D)has cooked
(A)cooked
(B)was cooking
(C)cooks
(D)has cooked
参考答案