问题补充：
I like to sit the bus .
A. in the front of
B. in front of
C. in the front
D. at back of
答案：
(答案→)A. in the front of
B. in front of
C. in the front
D. at back of
解析：in front of就是指在某物的前方。 in the front of是指在某物的内部靠前的地方。in the front是在前面，at back of中back前缺少定冠词。根据题意我喜欢坐在公交车前部.选项A 最符合题意。
