It is well understood _____ controls the flow of carbon dioxide in and out the atmosphere today

There ___________somebread and two cakes on the table . be

_________ she can be annoying at times, I like her.

Nelson Mandela, who had been _ for 27 years, received the Nobel Prize ________ Peace in 1993

k that something has to be done to stop the airfrom being polluted, ______