THE PREHISTORYC. 
THE METAL AGE.
Matching exercise (by Juan Luis Serrano Pedrosa).
Match the items on the right to the items on the left.
Number 1 is ...
Number 2 is ...
Number 3 is ...
Number 4 is ...
Number 5 is ...
Numebr 6 is ...
melt.
skills.
products.
bartering.
transport.
carts.