Perhaps the most significant postwar trend was the decentralization of cities throughout the UnitedStates，( )when massive highway-building programs permitted greater suburban growth.

未知题库 2024-12-15 1720

摘要： A.and accelerated a phenomenon B.a phenomenon that accelerated C.accelerating a phenomenon which D.the acceleration of which p...

A.and accelerated a phenomenon
B.a phenomenon that accelerated
C.accelerating a phenomenon which
D.the acceleration of which phenomenon
参考答案：……