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。