Learning a language properly is very (2) ______.

The production of books (5) ___________in Ancient Egypt, though not in a form that is recognised to us today.

Books are very adaptable, (4) ________us with both entertainment and information.

The invention of the book is one of humankind's greatest achievements, the importance of (3) _______cannot be overestimated.

The invention of the book is one of humankind's (2) ________achievements

Nearly all the discoveries that have been (1) ______through the ages can be found in books.

In the future the Hawaii Rare Plant Restoration Program aims (5) _______collecting genetic material from the remaining plants in the wild for storage as a safety net for the future.

Invasive weeds have been removed in key areas and fencing put up in order to (4) _________plants in the wild.