3 Read and write. 读单词，找一找 th 的发音规律，再分别写 3 个发音相同的单词。

第一组（/ð/ 发音）:
1. this
2. that
3. those
第二组（/θ/ 发音）:
1. three
2. think
3. thank

4 Read and order. 读一读，给句子排序。
1 Wu Hao: You look so happy. Why?
□ Wu Hao: Yes. But my favourite festival is the Dragon Boat Festival.
□ Li Hong: What do you do during the Dragon Boat Festival?
□ Li Hong: Thanks. Do you like Children's Day?
□ Wu Hao: Happy Children's Day!
□ Li Hong: We will have a party for Children's Day.
□ Wu Hao: We eat zongzi and hang mugwort (艾草) on the door.
8 Li Hong: That's cool!

2 Li Hong: We will have a party for Children's Day.
3 Wu Hao: Happy Children's Day!
4 Li Hong: Thanks. Do you like Children's Day?
5 Wu Hao: Yes. But my favourite festival is the Dragon Boat Festival.
6 Li Hong: What do you do during the Dragon Boat Festival?
7 Wu Hao: We eat zongzi and hang mugwort (艾草) on the door.