He sat downa computer.A. in the front ofB. in front ofC. in frontDfront of

问题补充：

He sat downa computer.

A. in the front of

B. in front of

C. in front

Dfront of

答案：

A. in the front of

(答案→)B. in front of

C. in front

D. front of

解析：in the front of在……的前部；in front of在……的前面；in front在前方；front of在前方。句意他坐在电脑前面。选项CD不能直接用作介词短语，故选B。