财产保险的保险利益的时效规定是( )。

A．保险合同订立时

B．损失发生时

C．从保险合同订立到损失发生时

D．从保险合同订立到合同到期时

To compete more effectively with others，it is time that university students       to study

abroad after graduation．

A．tried

B．are trying

C．try

D．will try