问题补充：
(·中原名校联考)Not only polluted but also crowded.
A. is the city；are the streets
B. the city is；the streets are
C. is the city；the streets are
D. the city is；are the streets
答案：
A. is the city；are the streets
B. the city is；the streets are
(答案→)C. is the city；the streets are
D. the city is；are the streets
解析：句意：这个城市不仅被污染了，道路也很拥挤。not only...but(also)．..引导分句时，not only后面的分句需要倒装，but also后的分句是不倒装的。故选C。
