–ThelightinBill’sofficeisstillon.Iwonder

问题详情：

–The light in Bill’s office is still on. I wonder ______.

--Maybe at midnight again.

A. if will he stop working       B. why he works so hard2

C. how long will he work         D. when he will stop working

【回答】

D

知识点：宾语从句

题型：选择题