– What’s this? -- It is ___________.
—__________ 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.