Correct the error, there is one sentence that has NO error

1. "I would like more tea please," she said
2. If we don't hurry up we will miss the train.
3. Rebecca is the most old person in the class.
4. I no like it when it rain.
5. This is jovitas watch right?
6. Before we eat dinner lets wash are hands.

The error can be punctuational, a word that is spelled incorrectly, etc.