题目内容
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提问人：网友ucheng
发布时间：2022-01-07
[主观题]
Perhaps the most significant postwar trend was the decentralization of cities throughout the United States, _______________ when massive highway-building programs permitted greater suburban growth.
A、and accelerated a phenomenon
B、a phenomenon that accelerated
C、accelerating a phenomenon which,
D、the acceleration of which phenomenon
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