I can't get my car --- on cold mornings,so

问题描述:

I can't get my car --- on cold mornings,so
I can't get my car ____ on cold mornings,so I have to try ___ the radiator with some hot water
A running; filling B ran; filling C run to fill D.running to fill
请问为何要选什么?怎么不选D?

A,get running使它运行
try doing尝试去做
try to do努力去做
还是尝试比较恰当