【帮我回答几道定语从句的题目吧谢谢!1、Maythefourthistheday__weChinesepeoplewillneverforget.A.whichB.whenC.onwhichD.inwhich2、October1,1949istheday__thePeople'sRepublicofChinawasrounded.A.whichB.whenc.thatD.】

　　帮我回答几道定语从句的题目吧谢谢!

　　1、Maythefourthistheday__weChinesepeoplewillneverforget.

　　A.whichB.whenC.onwhichD.inwhich

　　2、October1,1949istheday__thePeople'sRepublicofChinawasrounded.

　　A.whichB.whenc.thatD.onthat

　　3、I'vegotabook__willinterestyou.

　　A.I'msureB.andwhichC.andI‘msurewhichD.whichI'msure