It is mobile phone he sent me. I’ve never seen better one before.A. a; aB. the; aC. a; t

问题补充：

It is mobile phone he sent me. I’ve never seen better one before.

A. a; a

B. the; a

C. a; the

D. the; the

答案：

A. a; a

(答案→)B. the; a

C. a; the

D. the; the

解析：根据mobile phone 后定语从句he sent me可知此处为特指，故用定冠词；下文更好的一个，one是泛指任何一个，为泛指，故用不定冠词。选B。