问题补充:
—What time will Mr. Brown be back to China?
—Sorry. I don’t know.
A. when did he go abroad
B. why he is going abroad
C. how soon will he be back
D. how long he will stay abroad
答案:
A. when did he go abroad
B. why he is going abroad
C. how soon will he be back
(答案→)D. how long he will stay abroad
解析:本题回答语know后跟的是一个宾语从句,应该用正常的陈述句顺序,故不选AC,本题上句问的是时间,回答语和时间有关的只有D项,故本题选D。