marble

[ˈmɑ:bl]
noun

1.	(uncountable noun) [stone] marmo m

2.	[for game] biglia f

marbles

noun
(uncountable noun) [game]

biglie fpl

marble

Francese

Spagnolo

Tedesco

Complétez la séquence avec la proposition qui convient.

America … by Christopher Columbus in 1492.
- discovered
- was discovered
- is discovered