She got into her car. She hoped it would start. Sometimes it started immediately. Sometimes it started after five minutes. Sometimes it didn't start for 20 minutes. She had taken it to amechanic. He couldn't fix the problem. He didn't know what the problem was. She had taken it to another mechanic. He knew what the problem was. She needed new spark plugs. He put in the new spark plugs. She paid him. She thanked him. Now her worries were over. She didn't have to worry anymore. Every time she turned the key, her car started immediately. But a week later, her car didn't start immediately. It started after five minutes. She called up the mechanic. He said to bring the car in. He would look at it again.