Li Jun got on the train and found his seat _____ it.
问题描述：
Li Jun got on the train and found his seat _____ it.
A in front of B below C beside D at the front of
答
D.
A is in front of B是指A在B的前方,A在B之外；
A is at the front of B是指A在B的前半部,A是B的一部分.