单选题He is sitting _______&nbs

问题补充：

单选题Heissitting_______theroomthatis_________theoldtree.A.in the front of/in the front ofB.in front of/in the front ofC.in front of/in front ofD.in the front of/in front of

答案：

D解析in front of表示外部的前面 in the front of表示内部的前面。