1.I still remember the house ------- my mother and i used to

1.I still remember the house _______ my mother and i used to stay in that evening.
A.where B.which C.in that D.the one
2.I came to tell you that Mr.Wang ______ for London tomorrow afternoon.His plane ___ at 4 am.
A.leves;leves B.is leving;leves C.is leving;is leving D.leves ;is leving
3.The party last night was _____success.We sang and danced until it came to ____ end at night.
A.a;an B.a;the C the an D.不填 an