—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice.
I went to bed very late that night, _____, early the next morning.
—How long did you do your homework? —______.
My mother bought me a new pair of boots on my birthday _____she had promised.
. We liked the oil painting better ___ we looked at it.
Through English we will be able to communicate_____ part of the world we come from.