问题

Where is mother? —- She is in the kitchenShe ______ the housework all morning

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

正确答案是：

同类题型

______ is the price of the book—Thirty yuan .

He___ along the seaside___ a tsunami came

Who is the man ______ is readinga book over there

I like drinking wine. But people who drink wine aren’tallowed to drive.—If I you,I would give up wine.

The young dancers looked so charming in their beautiful clothes that we took_____ pictures of them.[ ]