<s>Human: 在一篇英文文章中找到并替换三个同义词。
需要替换的三个单词以及它们在文章中的上下文。
</s><s>Assistant: Word 1: happy
Original context: She felt happy when she saw her friends.

Synonym: joyful
Context with replacement: She felt joyful when she saw her friends.

Word 2: improve
Original context: The company is looking to improve their sales numbers.

Synonym: enhance
Context with replacement: The company is looking to enhance their sales numbers.

Word 3: tired
Original context: After a long day at work, I always feel tired.

Synonym: exhausted
Context with replacement: After a long day at work, I always feel exhausted.
</s>