答案:A
分析:缺宾语,C, D都不能作宾语.一句话中只能有一个谓语,而B中有was,句中出现两个谓语,一定错.
参考译文:1955年1月7号,Marian Anderson成为在第一个在纽约Metropolitan Opera House担任主唱的美籍黑人.
4. 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
答案:B
分析:考的是同位语结构,a phenomenon是 the decentralization of cities throughout the United States 的同位语.A中and为conj.,后面应该连接一个完整的句子,但缺主语,错;C中语序混乱,错; D中of which作为介词宾语,后面应该接一个完整句,但只有一个phenomenon主语,句子不完整,错.
参考译文:可能战后最重大的趋势就是美国城市的分散化,当大规模高速公路建设项目容许了更大程度的发展郊区,这个现象更被促进了.
补充: accelerate/ accomplish/ achieve/ evolve都可以是vi.不接宾语
5. Ronald Reagan had served two terms as governor of California before _________ President.
A. he became
B. when becoming
C. became
D. did he become
答案:A
分析:before为状语从句引导词conj,后面一般引导一个完整的句子.B同时出现两个状语从句引导词,错;C缺主语;D应该为正常语序,选项中使用了倒装句式,错.
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