(单选题)

Do you know ______ Beijing or not next week?

A.if they are leaving for

B.if are they leaving for

C.whether are they leaving for

D.whether they are leaving for

参考答案：D

参考解析：

考查宾语从句语序。句意：你知道他们下周是否要去北京吗？根据句子成分分析可知，该句是宾语从句，在名词性从句中，应该使用陈述语序，所以排除B项和C项。又根据后面的“or not”可知宾语从句应该用whether引导。故选D。

知识点：