一患者缺失，面Ⅱ°龋坏，近中舌向倾斜、不松动，余留牙牙石Ⅱ°，左侧下颌隆凸明显、倒凹大，上颌牙完全正常。

设计可摘局部义齿时，基牙应选（）

A.

B.

C.

D.

E.

—You all like your English teacher?

—Yeah, she devotes herself____ to teaching and it earns her a good reputation．

A．originally

B．extremely

C．obviously

D．entirely