六年级上册英语第四单元的重点句子包括：
1. Did you have fun at Christmas？ 圣诞节你玩得开心吗？
2. The Christmas holiday was very fun. 圣诞节很有趣。
3. Do you have a special holiday in China？ 在中国你们有特殊的节日吗？
4. We have many special holidays. 我们有许多特殊的节日。
5. My favourite holiday is the Spring Festival. 我最喜欢的节日是春节。
6. What is your hobby？ / What’s your hobby？ 你的爱好是什么？
7. I like singing. 我喜欢唱歌。 / I like collecting stamps. 我喜欢集邮。
8. What is his / her hobby？ 他/她的爱好是什么？
9. He / She likes collecting stamps. 他/她喜欢集邮。
10. Li Ming is going to a Chinese restaurant with Jenny’s family this evening. 李明今晚要和Jenny的家人去一家中国餐馆。
11. What was last year？ It was the year of the pig. 去年是什么年？去年是猪年。
12. How does she go to work？ 她怎样去上班？
13. She goes to work by bus. 她坐公交车去上班。
这些句子涵盖了询问爱好、节日、工作方式等话题，适合六年级学生的英语学习和运用