全口义齿初戴，义齿唇颊侧边缘应是（）。

A.越厚越好，固位力强

B.越薄越好，舒适轻巧

C.让开唇、颊系带处

D.半圆形略越过唇颊沟

E.圆形离开唇颊沟

The new law states that people ________ drive after drinking alcohol.[ ]

A. wouldn't        

B. needn't      

C. won't                

D. mustn't