11.   Harvest mature, ripe gourds from the vine, and soak them in water for several days until the outer wall falls off.

12.   How did the wall fall?

13.   His elder sister, sleeping on the first floor, had died when a wall fell on her.

14.   Just as the wall was falling, he was put in charge of overseeing artifacts.

15.   Once the wall of silence fell, demystification proceeded apace.

16.   Overnight, rules changed and protective walls fell.

17.   Since the Berlin wall fell, documents and public statements have revealed systematic doping.

18.   Soak the mature gourds in water for several days until the outer wall falls off.

19.   The crumbling walls fall away on all sides.

20.   The new buildings adjoin old apartments that existed before the wall fell.