Yesterday,I saw three girls ______ the car and walk into the

get out of
(使)从…出来；(使)从(车等)下来：
The door locked accidentally, and I couldn't get out of the room.
门无意中反锁上了,我无法从房间里出来了.
get off

. (从…)下来,(从…)下去：
That roof is dangerous, do get off.那房顶太危险,千万要下来.
注意：get out of 有从里面到外面的感觉,而get off 从上面到下面的感觉.从车里出来应该从里面到外面.