—Has Sam finished his report?

—I have no idea. He _______ it in his office the whole morning.       

A．writes

B．has written

C．will write

D．was writing

下列各项中，（）属于统计行政法规。

A.关于工资总额组成的规定

B.统计执法检查规定

C.全国经济普查条例

D.涉外调查管理办法

E.统计法实施细则