要使可摘义齿获得良好的固位效果，卡环臂应放置在基牙的正确位置上，并具有正确的形状。

卡环臂在基牙上的正确位置，取决于 （）

A.导线

B.牙冠形状

C.颊、舌臂有别

D.卡环类型

E.基牙的位置

In my view, London’s not as expensive in price as Tokyo but Tokyo is ______in traffic.

A．the most organized

B．more organized

C．so organized as

D．as organized as