除了肺呼吸外，还有副膀胱辅助呼吸的爬行动物是（）。

A、石龙子

B、蛇类

C、壁虎

D、龟鳖

What __________ Amy does and many people are thankful to her.

A．a important job

B．an important work

C．a important work

D．an important job