There is a big tree the classroom.
A. in front of
B. at the front
C. in the front of
D. in front
网友回答
(答案→)A. in front of
B. at the front
C. in the front of
D. in front
解析：
试题分析: 此题重点考查in the front of和in front of的区别。两者都表示在…前面，前者表示在内部，后者表示在外部，此句的含义是在教室的前面有棵大树，大树肯定在教室的外面，故选A。