—Father's Day is coming. I'm going back home to see my father.

—                     .[ ]

A. Give my best wishes to him

B. It's very kind of you

C. Say goodbye to him, please

D. See you soon

患者右下1缺失，右下2稳固，左下1冠根比为1.5：1，当设计双端固定桥时应当（）

A.右下2最好设计冠内固位体

B.右下2最好设计3/4冠

C.降低桥体咬合面

D.增加左下2做基牙

E.桥体与左下1之间用活动连接体