10.I can't understand _________.A.what does Christmas mean B.what Christmas does meanC.what mean Christmas does D.what Christmas means刚发现B多了个does 被我忽略掉了

10.I can't understand _________.A.what does Christmas mean B.what Christmas does meanC.what mean Christmas does D.what Christmas means刚发现B多了个does 被我忽略掉了
10.I can't understand _________.
A.what does Christmas mean B.what Christmas does mean
C.what mean Christmas does D.what Christmas means
刚发现B多了个does 被我忽略掉了

10.I can't understand _________.A.what does Christmas mean B.what Christmas does meanC.what mean Christmas does D.what Christmas means刚发现B多了个does 被我忽略掉了
D,选项部分是一个宾语从句,在从句中,如果有疑问词,将疑问词提前,剩下的部分按陈述句语序.