Besides proper diet, exercise is one of the key ___________of a healthy lifestyle.

China has got a good         for fighting against the flu with its careful and smooth organization．

The boy wrote＿＿＿＿＿last week．

I can remember very few ____ when he had to cancel his plans because of poor health．

They wanted someone with _____ for this job, so as a freshman I had _______ that day.