Instead of flocking into the cities, the
问题:
Instead of flocking into the cities, the peasants __________ villages and townships of a new type in the past few years.
A.had built
B.was building
C.have been building
D.built
Instead of flocking into the cities, the peasants __________ villages and townships of a new type in the past few years.
A.had built
B.was building
C.have been building
D.built