The _____ of traffic on the roads has increased dramatically in recent years.

The v__1__(名词"量,容量,音量"等) of traffic on the roads has increased dramatically in recent years.

The (volume) of traffic on the roads has increased dramatically in recent years.

A、

the amount of sound produced by a television, radio etc.

a measurement of the amount of space that a substance or object fills, or the amount of space in a container

the total amount of something, especially when it is large or increasing

The ________ of home computers has increased greatly in recent years.

The ____________ of smart phones has increased greatly in recent years.

A、popularity
B、familiarity
C、population
D、explanation