Running for fresh air

2 Mar

As usual,we had self study time for three hours——maybe should call it a homework time.
During the break time,I thought I needed more fresh air.You know the carbon dioxide level in the classroom must be high that even my face turned red.My friend and I decided a running and went to the playground.
We ran only 800meters,but felt better.though it was so cold in night.
We will also do running tomorrow.

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