问题补充:
The man sat the bus, because he is the driver.
A. in front of
B. at front of
C. in the front of
D. the front of
答案:
A. in front of
(答案→)B. at front of
C. in the front of
D. the front of
解析:in front of在…前面, in the front of 在…前部(在某范围以内)
at the front of 在…前部与in the front of同意
at…强调“前部的某一点” in强调在…范围的前部 故选B.