下列有关动物运动的各项叙述中，错误的是（　　）

A．鱼依靠鳍进行运动

B．飞行的昆虫靠翅的快速振动飞行

C．草履虫依靠纤毛的摆动在水中运动

D．变形虫依靠鞭毛运动

—Why don't you go to Chongqing by plane?

—Going by bus doesn't cost as ______ as by plane. [ ]

A. many

B. much

C. more