—I think we should save the endangered animals.           

— I agree       _ you.  There are not many of them.        [ ]

A. to            

B. with          

C. about

髓周牙本质是指

A．成牙本质细胞突周围的牙本质

B．罩牙本质

C．根部牙本质的透明层

D．罩牙本质和透明层以内的牙本质

E．小管间牙本质