在咖啡和茶之间，我更偏爱咖啡。

Between coffee and tea, I ___favor coffee more.

你能帮个忙把这份文件送到三楼吗？

Could you do me a ___favor and deliver this document to the third floor?

你能帮我这个忙吗？我下次一定回报你。

Can you do me a ___favor? I'll return it next time.

老师不应该偏爱班上的任何一个学生。

Teachers should not ___favor any particular student in the class.