Recently quite a lot of experts _____ that another law on wildlife protection ____ as soon as possible.

A．suggested; must be passed

B．have suggested; be passed

C．were suggesting; was passed

D．suggested; being passed

电网联网后在发生事故时具有相互紧急支援的作用，但是由于联网后系统容量增加，使得发生故障后切除发电机组对电网的影响相对增加。