_______ you have masses of work to do, you don’t have to help me with the housework. 

A．So that

B．Now that

C．If that

D．in that

右上第一磨牙近中颊根牙槽骨完全破坏，另两根牙槽骨吸收仅2mm

A．引导性组织再生术+植骨术
B．游离龈瓣移植术
C．根向复位瓣术
D．截根术
E．牙龈切除术
下列情况最可能采取的术式