in front of the door
at the gate of school
at the door of the classroom"in front of the classroom"应该指的是教室的前部,那一大块面积,并没有确切地表达出是在教室门的附近.
In front of the school.
in the school gate
before
in front of door
In front of the classroom,这就是在教室门前,不用考虑"门"
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