---Mom, there is little milk,______?---No,there isn’t. Could you please go and buy some?
—Most paper is made________wood. —Yeah.But most books are made________paper.
Many overseas Chinese look forward to________more about their roots in the summer camp.
—Where did you get these old doors? —From the old houses which were________by the workers.
Things should________here before you enter the Great Museum.
—There are only a few old city walls left. —Yeah.Most of them________in the 1960s.