她没有告诉妈妈这是从网上买来的，并说花了5000元买的，这让妈妈很高兴。
She didn't tell her mother she bought it online and said it cost 5,000 yuan, which satisfied her mother.
我三元买的这支钢笔。
这是发生在大概2年前的事，我在百货中心花了9000元买的电脑，但是，第二天去，它就降价了2000元，这件事让我很郁闷。
It happened some two years ago. I bought a computer for 9000 yuan in a department store. But the next day when I went there, the price was already 2000 yuan lower. I was so upset.
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