—Where is Mother?—She is in the kitchen. She ______ the housework all morning.

题型：单选题题类：常考题难易度：困难

黑龙江哈尔滨师大附中2016-2017学年高二上学期英语10月月考试卷

—Where is Mother?

—She is in the kitchen. She ______ the housework all morning.

A、is doing B、was doing C、has done D、has been doing

举一反三

—Sorry，I ________the piano for years.

—I'm sorry, but it ________ already.

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