---I wonder e-mail English is better, yours or your parents’？
---I prefer mine.
A. that
B. what
C. whether
D. whose
网友回答
A. that
B. what
C. whether
(答案→)D. whose
解析：考查宾语从句。wonder后跟从句作宾语，that无意义；what作主语、宾语或表语；whether作状语；whose作定语。句意：我想知道谁的电子邮件更好，你的还是你父母的？根据句意可知，用whose作定语，故选D。