There is little we can do about it,_____?   [ ]

A. is there      

B. can't we        

C. isn't there      

D. can we

拉线是使线路稳固的主要部件之一，且受震动和易受人们不经意的扰动，所以其紧固金具是否齐全是关系到拉线能否正常受力、保持张紧状态、不使电杆因受力不平衡或受风力影响而发生歪斜倾覆的关键。( )