---What’s this the wall?- It’s a photo my family.A. in inB. on ofC. in ofD. on on

问题补充：

---What’s this the wall? --- It’s a photo my family.

A. in, in

B. on, of

C. in, of

D. on, on

答案：

A. in, in

(答案→)B. on, of

C. in, of

D. on, on

解析：on the wall 在墙上，in the wall在墙里面，后面说是照片所以应用on the wall，a photo of my family 我家人的照片。of “……的”,in在……里面，on在……上面，故选B