ENGLISH PROBLEMS
1.This is the house _____ we used to sleep.
A.where B.that C.which
2.He said _____ the man _____ had robbed the bank had long hair.
A.who;who B.that;that C.that;which
3.That's the Museum _______ we visited last year.
A.where B.which
答案选B,为什么?