将下列句子中的汉语部分译成英语，注意使用适当的形式

1. The old woman feels    （疲劳） after a long walk.

2. His son has a          （头疼）.

3. I have a                  （嗓子疼）, so I can’t speak a word.

4. I brush my          （牙）twice a day.

5. The little boy eats too much. He has a          （肚子疼）