Eli Whitney's milling machine remained unchanged for a century and a half because ........... was so efficient.

Clipper ships were the swiftest sailing ships that.................. to sea and the most beautiful.

A home computer .................... an opportunity for convenient and efficient work at home.

Many people............ their jobs because of the firm's collapse.

The king just ………..  here yesterday.

The founders of the American nature........... the custom after the Revolution.

There .................... only one place in the whole of England where it .................... legal to drive on the right.