原式=1+4+[4×（-14）]8
=5+1
=6．
只有依法履行了登记手续，取得了结婚证，婚姻才能成立，婚姻关系才（）。
—When were you born?
— I was born_______ a cold winter morning in 1996.
A. on B. in C. at
