蝗虫坚韧的______既能保护和支持内部的结构，又能有效地防止体内的______蒸发，这是节肢动物适应陆地生活的重要原因．

--- I think he is taking an active part in social work.

--- I agree with you _________.

A．in a way

B．on the way

C．by the way

D．in the way