Not only polluted but crowded.
A. was the city; were the streets
B. the city was; were the streets
C. was the city; the streets were
D. the city was; the streets were
网友回答
A. was the city; were the streets
B. the city was; were the streets
(答案→)C. was the city; the streets were
D. the city was; the streets were
解析：
主要测试特殊结构中的倒装。此类试题的题眼：寻找题干中的关键词：not only和 but ，符合倒装的要求：前面句子倒装；后面的句子不倒装。