New Words：

worth [wɜːrθ]
n.价值, 财富
adj.值得的, 值钱的

worthless [ˈwɜrθləs] adj. 没用的；无价值的

Sample Sentences：

Don't read worthless books.
That book is not worth reading.
This necklace is worth about 1, 000 US dollars.
When the well's dry,we know the worth of water.
We are seeking answers to "What is my life worth? "

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