题干

—Sorry, but I have something important to talk to your mother. Is she in right now?

—Yes. Come in, please. She ______some cleaning in the kitchen.

A:is doing

B:does

C:did

D:was doing

上一题 下一题 0.0难度 选择题 更新时间:2018-10-21 05:01:52

答案(点此获取答案解析)

A