毒性最大的局麻药是（）。

A.普鲁卡因

B.利多卡因

C.丁卡因

D.布比卡因

E.依替卡因

In our school, _____ students like English, but _____ of them can speak English smoothly.

A．a little, a few

B．a few, few

C．a few, little

D．a little, few