因成釉细胞瘤需切除左半侧下颌骨，如用肋骨移植，最常选择的肋骨是

A．左五肋

B．左七肋

C．左九肋

D．右七肋

E．右九肋

In my opinion,        to worry about the present situation between China and Japan. Everything will be all right.

A．it is no need

B．there is no wonder

C．it is no wonder

D．there is no need