16.All bones have an exterior layer, termed the cortex,that is smooth,dense,continuous,and___.
A.of varying thickness
B.varied thickness
C.its thickness varies
D.its thickness varying
8.The bonding power of any adhesive dependa on the cohesion of the adhesive itself and___to the surface to which it is applied.
A.how well does the adhesive adhere
B.how well the adhesive adheres
C.does the adhesive adhere
D.the adhesive adheres. | 
