問題詳情：
—Could you tell me ?
—At the end of July.
A. how often he heard from his pen pal
B. how soon he will be here
C. that he went on vacation
D. when you will start your vacation
【回答】
D 由答語句意“在七月底”可知，賓語從句的內容是詢問時間的，故只有D項（你的假期將什麼時候開始）符合語境。
知識點：賓語從句
題型：選擇題
