There are many trees our house.A. in front ofB. in the front ofC. behind ofD. at the back

问题补充：

There are many trees our house.

A. in front of

B. in the front of

C. behind of

D. at the back

答案：

(答案→)A. in front of

B. in the front of

C. behind of

D. at the back

解析：CD本身作为词组就是错误的，因被排除，A表示在物体外部的外面，B表示的是在物体内部的前面，故选A