This weekends I have to work _____ my paper _____ geography.介词填空

问题描述:

This weekends I have to work _____ my paper _____ geography.介词填空

This weekends I have to work on my paper for geography.
这周末我要准备我地理课的作文
work on是个词组,意思是做什么事
for在这里是infer是为了什么的paper,明显是一节课,名词用for,后面是修饰paper的