Not only _______ polluted but also_______crowded．
A.was the city; were thestreets
B.the city was; were the streets
C.wasthe city; the streets were
D.the city was; the streets were
网友回答
C解析not only…but also…用来连接两个并列分句，当not only位于句首时，其后的分句要用倒装语序，but also后的分句不用倒装语序，故C对。