单项选择题

W：My car wouldn’t start in the afternoon.And it stopped many times on the way.
M：How old is your battery？
W：It’s quite new.I changed it three weeks ago.
M：Then would you leave your car and keys here？I’ll cheek it tomorrow.
W：Can you make it a bit sooner？
M：Sorry，Miss.We’ve had many cars here.There is nothing I can do.
W：How much does it cost just to check？
M：Well，it is ＄7an hour.
W：OK，I’ll call again tomorrow.
What’s wrong with that car？（）