“Where is Mother.” “She is in the kitchen. She _______ the housework all morning

题型：不详难度：来源：

“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

答案

D。

解析

现在完成进行时表示从过去至今一直在持续的动作。