当地方性法规与部门规章的有关规定相抵触时（）。

A．地方性法规自然无效

B．部门规章自然无效

C．由国务院提出意见

D．由最高人民法院裁决

How long do you think­­­_________Obama officially takes office in the White House?

A．it will be that

B．will it be until

C．will it be when

D．it will be before