The first two stages in the development of civilized man were probably the invention of weapons and the discovery of fire, although nobody knows exactly when he acquired the use of the ______.

A．It is the only record left of the painting.
B．It is not an accurate representation of the painting.
C．It has become more valuable .than the painting.
D．It was destroyed with the painting in a fire.

A．The rain ruined the food.
B．The restaurant was closed.
C．Neither of them brought any food.
D．Someone took their food.