【题目】I am looking forward to the day ________ my daughter can read this book and know my feelings for her.
A.as
B.why
C.when
D.where

【答案】C
【解析】句意：我正盼望我女儿能够阅读并知道我对她的感情的那一天。这是一个限制性定语从句，修饰先行词为the day，在从句my daughter can read this book and know my feelings for her.作时间状语，故用关系副词when。故C正确。