Answer:
1. After Freddy spends his holiday in China he wants to learn Chinese.
2. Joanna phoned Dad at work before she left for her trip.
3. Susanna turned on the radio after she washed the dishes.
4. When they arrived the match had already started.
5. After my brother came home he fed the cat.
6. Before she sang a song she played the guitar.
7. We watched a video after the children went to bed.
8. After Erin made breakfast she called her friend.
9. I am very tired because I swam too much.
10. The kids rode their bikes before they met their friends.
