iF you ArE At A Crossing whErE thE trAFFiC hAs grEEn light, you shoulD ______.
A．mAkE surE thAt DrivEs hAvE Enough timE to givE wAy to you
B．Cross thE roAD in thE sAmE DirECtion As thE trAFFiC
C．wAit until thErE is A trAFFiC holD-up
D．wAit until thE light For thE trAFFiC ChAngEs to rED