Only when he read the newspaper _____ the US President Obama would deliver a speech in Fudan University.

A．he knew

B．he knows

C．does he know

D．did he know

经营性物业贷款的抵押权存续期间，未经成都农村商业银行股份有限公司经办分支机构书面同意，抵押人不得出租、变卖、再次抵押、抵偿债务、赠与或以其他任何方式处分抵押物。