There have been several reported ___ of UFOs in this area.

I don't know where my keys are - they seem to have ___!

Tom's ideas about the nature of time might be ___ to the average person.

A star is a[n] ___ object.

Copper is used in wires as it is highly ___.

The beginning of the novel was so ___ that I couln't wait to find out what would happen next.

The rapid rate of technological change in the last 10 years is truly ___.

Einstein ___ the theory of relativity in 1905.

The burning of certain chemicals ___ toxic  gases into the atmosphere.

The sudden announcement of the company's closure caused ___ among the staff.

The fruit has been grown without the use of ___.

The president ___ that the economy  was stable.

This is a good area  for farming, as water and good soil are ___.

She ordered ____ cupboards for her kitchen.

A strong glue is used to ___ the book's pages together.

The soil here is rich in ___ and ideal for growing crops.

Scientists analysed the chemical ___ of different plastics.

Rome is ___ one of the most fascinating cities in the world.

The hormone insulin ___ the amount of sugar in the blood.

The ___ computer software industry has created a huge number of new jobs.

Security matters are treated with the ___.

There is an acute ____ of nurses in rural areas.

These apple trees ___ a large amount of fruit each autumn.

We can ignore them for now, but ___, we'll have to deal with these issues.

The full moon was a huge white ___ in the clear night sky.