It has been proven that cockroaches ___________ for several weeks even after their heads have been cut off.

are serviving

can survive

Serviving

that servive

Can use to express

ability or opportunity,

to request or offer permission, and

to show possibility or impossibility. Examples:

ü I can ride a horse. ability

ü We can stay with my uncle when we are in Lahore. Opportunity

ü Any child can grow up to be president. possibility

ü he cannot stay out after 11 PM. permission

ü Can you hand me the pen? request