问题

______ halfway through the exercise, the teacher changed his mind and collected all our papers.

A:When only being
B:When we were only
C:Being only
D:Having been

正确答案是：

同类题型

We have _____ music room and _______art room ______ the building.

_______ the necklace borrowed from her friends madeher ______ completely.

It’s nearly time for the meeting to start. The manager ________ be here soon.

After he did his homework last night, he went on TV.

All the students had gone out.There was in the classroom.