This is ______ English book and that is ______ Chinese book.
—__________ yogurt do we need? —Two cups.
We don’t know __________ he can make a plane by himself. It is amazing.
—When __________ he __________ fishing? —Next weekend.
—How long are you staying here? —That __________ the weather.
—I think a good friend should be __________ all his or her subjects. —I don’t agree. I don’t think grades are important in a friendship.