They arrived at the farmhouse in front of which .A. is sitting a boyB. sat a boyC. a boy

问题补充：

They arrived at the farmhouse, in front of which .

A. is sitting a boy

B. sat a boy

C. a boy sat

D. a boy is sitting

答案：

@@A. is sitting a boy@@(答案)B. sat a boy@@C. a boy sat@@D. a boy is sitting

解析：地点状语放在句首构在完全倒装，即主语与谓语直接颠倒位置，不加助动词。选A、D与主句时态不符，选项C应构成倒装句才对。