【巧克力】評論
B: Running at the park. (在公園跑步)可得知B的回答是在說動作,可回推問句應該是在問在做甚麼。故答案為(D)What is Rex doing (Rex正在做甚麼?)(A)Who is Rex running with(誰跟Rex在跑步?)(B)Where is Rex from(Rex來自哪裡?)(C)How is Rex doing (Rex怎麼樣了?/Rex表現得如何?)