is your pen pal from?---He is from Australia.A. WhenB. WhereC. WhoD. Which

问题补充：

--- is your pen pal from?

---He is from Australia.

A. When

B. Where

C. Who

D. Which

答案：

A. When

(答案→)B. Where

C. Who

D. Which

解析：根据答语的意思：他是来自澳大利亚的，可知上句问的是：你的笔友是来自哪的？故用疑问词where,选B。