问题

In order to find the missing child，villagers ________ all they can over the past five hours.(2012·安徽)

A:did
B:do
C:had done
D:have been doing

正确答案是：

同类题型

Our school is tothe lake .

Can you ________ English—Yes, but only a little.

Who teaches _________ English — _________.

—Catherine, I have cleaned the room for you.——Thanks, You it. I could manage it myself.

Kate. Let’s run right now. Or we’ll be late.—____. We still have 25 minutes left.