人类开始栽种植物是从什么时候开始?人类开始栽种植物是从什么时候开始?
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He is from Canada, so he is a C______.He is from Canada, so he is a C______.
I feel satisfied with my life.I feel satisfied with my life.
They have family responsibilities and a stressful life.They have family responsibilities and a stressful life.