In the 1960s,a lot of old city walls in Beijing________because people thought them useless.
A.pull down |
B.have pulled down |
C.were pulled down |
D.had pulled down |
In the 1960s,a lot of old city walls in Beijing________because people thought them useless.
A.pull down |
B.have pulled down |
C.were pulled down |
D.had pulled down |