Hospitals take strict precautions to assure that nothing adulterates the blood supply.
** adulterate : render something poorer in quality by adding another substance, typically an inferior one.
<span>If people are protected in a bunker, they are taking refuge in a military fort?
True.</span>
Going
liking
having
working
listening
staying
visiting
enjoying
not knowing
speaking
Basically present progressive states that it is happening right now in the present time
I think it would be c because a piece of wood sometimes actually do that
