---Mum have you seen my mobile phone?you bought last week? I’m afraid I haven’t seen

问题补充：

---Mum, have you seen my mobile phone?

--- you bought last week? I’m afraid I haven’t seen .

A. The one; it

B. The one; one

C. One; it

D. One; one

答案：

(答案→)A. The one; it

B. The one; one

C. One; it

D. One; one

解析：the one 指代前文所提到的人或物。