in the front of 的反义词是什么是in the back of 还是at the back of

in the front of 的反义词是什么是in the back of 还是at the back of
in the front of 的反义词是什么
是in the back of 还是at the back of

in the front of 的反义词是什么是in the back of 还是at the back of
at the back of 是对的

in/at the back of

at the back of

in the back of

Should be
Behind!
however, you may use
at the back of

参见：
http://zhidao.baidu.com/question/82130020
上面写得很全了。

in the back of

两个都不是。是behind.