甲捡到了一只母山羊饲养起来，并在良种站花钱为母山羊配种，此后母山羊生了两只小山羊，后失主乙找到甲要羊。本案应如何处理( )

A．失主无权要回山羊

B．母山羊归还失主，小山羊归甲

C．大小山羊全归还失主，失主付给甲饲养费和配种费

D．大小山羊全归还失主，失主付给甲配种费但不付饲养费

—Now that you like the computer so much.Why not buy it?

—Well，I can't afford ________ computer.

A．that expensive a

B．a that expensive

C．that an expensive

D．an expensive that