which,in which,on which,for which ,of which 有什么区别,在定语从句中怎么用?

选A。which在限制性定语从句中就是指先行词,如题中的which就指先行词the day,在从句中作动词forget的宾语。"介词+which"不能只从意思上区别,介词的选择主要有3方面1,考虑先行词与介词的固定搭配。This is the farm on which he is working 。 on the farm 是固定搭配。2,考虑句意的需要。This is a factory into which he wants to go 。 go into the factory 。He is one of my friends with whom i am living 。 live with sb 。3, 考虑 定语从句谓语动词的固定短语所需什么介词。（这种情况尤为多些）This is a book in which i am interested 。 be interested in sth 。