下列步骤中，( )是买卖交易的最后一步，但也是至关重要的一个环节。
A．交易双方配对 B．实地看房C．物业交验 D．合同签订
参考答案：C
I told your friend how to get to the hotel， but I perhaps I __________ have driven her there.
A．could
B．must
C．might
D．should
简述鱼胃对食物的初步消化
