Coral has been highly valued ____the ages. It is one of the wonders of Nature. It is a strong substance formed ___the bones of very small sea animals.

A . Fill in the blanks with articles and prepositions :1x3=3

Coral has been highly valued ____the ages. It is one of the wonders of Nature. It is a strong substance formed ___the bones of very small sea animals.

Coral has been highly valued throughout the ages. It is one of the wonders of Nature.It is a strong substance formed in/with the bones of very small sea animals.