Use of English Part 2 FCE

Keeping food for long periods of time was historically a huge problem. This proved especially crucial (9) ........ times when there were droughts.

• at

• for

When agricultural production (10) ........ severely limited it caused many problems for the farmers.

• is

• was

People commonly used ice to keep food fresh but, of (11) ........ , ice itself melts relatively quickly. In

• indeed

• course

In 1859 an American, John Mason, invented a glass jar with a metal screw-on lid, creating a perfect seal and making (12) ........ possible to preserve food that would previously not have remained edible.

• it

• that

Mason’s jar is still (13) ........ use throughout the world.

• for

• in

An even (14) ........ successful method for keeping food by canning it in metal containers was perfected between 1870 (15) ........ 1920 by Englishman Bryan Donkin

• more, and

• better, through

A breakthrough came in the 1880s with the development of lighter materials, (16) ........ also enabled mass production of cans.

• which

• when