--- Mum, have you seen my mobile phone?
--- you bought last week? I’m sorry I haven’t seen .
A. One ; it
B. One ; one
C. The one ; it
D. The one ; one
网友回答
A. One ; it
B. One ; one
(答案→)C. The one ; it
D. The one ; one
解析：the one 特指上文中的那一个，同时后一个讲的是我没看见那一个（具有特指意味）因而用it，故选C