东方幻想乡催眠幽香:we offered him our congratulations ____his passing the exam.为什么选on，选for为什么不对？

we offered him our congratulations ____his passing the exam.为什么选on，选for为什么不对？ We all made him our monitor. 选择:We got lots of food, drinks and fruits＿＿A.for him B.for he C.to him we walk with our l__ We sallied forthon our excursion. We sallied forthon our excursion. must doing him we like stop this The young lady__ we met yesterday is our new maths teacher.A.what B.whose C.whom D.which We went to travel with some feiends of __.A.us B.ours C.our D.ourselves practice our habbies as ? as we want