{{B}}quEstions 16 to 20 ArE BAsED on thE Following tAlk.{{/B}}

A、Doing whAt wE wAnt to Do.
B、An iDEAl plACE whErE thErE is no pollution.
C、hAving to tolErAtE CArs’ pollution As wE likE to DrivE thEm.
D、Driving CArs’ pollution.