If there___on the street,you must be more careful to cross itA.are many traffics B.is many traffics C.is much traffic D.is a lot of traffics

问题描述:

If there___on the street,you must be more careful to cross it
A.are many traffics B.is many traffics C.is much traffic D.is a lot of traffics

c

C,因为traffic不可数