英文單字句子

以下是一些英文單字句子：

1. Hello, world!

2. I am here.

3. What's up?

4. Nice to meet you.

5. Thank you.

6. Goodbye.

7. How are you?

8. Can you help me?

9. I love you.

10. Be careful!

請注意，句子應該符合語法和語境，並且要表達清楚意思。

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