问题
单项选择题
Do you know（）?
A.where is the chief officer
B.where the chief officer is
C.is where the chief officer
D.where the chief officer
答案
参考答案：B
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Do you know（）?
A.where is the chief officer
B.where the chief officer is
C.is where the chief officer
D.where the chief officer
参考答案：B