Before changing lanes, identify a safe gap, check your mirrors and blind spots and your intentions to change lanes.

signal  your blinker  A light that blinks on and off is a blinker, and it may be used to signal your plans to change direction in a car, or to send some kind of signal.

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.

need the chart. attach