I didn’t know at first but later we became good friends.A. who is the boyB. who the boy i

问题补充：

I didn’t know at first, but later we became good friends.

A. who is the boy

B. who the boy is

C. who was the boy

D. who the boy was

答案：

A. who is the boy

B. who the boy is

C. who was the boy

(答案→)D. who the boy was

解析：本题考查的特殊疑问句作为宾语从句，句意：我已开始不知道这个男孩是谁，但是后来我们成为了好朋友。结合语境可知从句描述的是过去的状态，故用一般过去式。宾语从句一般为陈述语序。故选D。