Look at the library. Itsour classroom.A. in the front ofB. on front ofC. in front ofD. o

问题补充：

Look at the library. Itsour classroom.

A. in the front of

B. on front of

C. in front of

D. on the front of

答案：

A. in the front of

B. on front of

(答案→)C. in front of

D. on the front of

解析：句意：看那图书馆。它在我们教室前面。In the front of在……前面，是指在某事物内部的前面；in front of 在……前面，是指在某事物外部的前面，故选C。