We must work hard to (改善)our lives.
他够认真,对所有事三思而后行.
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为什么不参加校足球队的选拔呢?
Toni Morrison is considered as one of the best writers of the (第二十) century.
Early this morning I was busy (挖) in the garden to plant trees.
As the saying goes,"God helps those who help (他们自己)."