问题补充：
---Could you tell me ?
---Sorry，I have no idea. .
A. when does the History Museum open
B. when the History Museum opens
C. when did the History Museum open
D. when is the History Museum open
答案：
A. when does the History Museum open
(答案→)B. when the History Museum opens
C. when did the History Museum open
D. when is the History Museum open
解析：宾语从句中词序应为陈述句形式。
