A flower placed on aerogel held over a Bunsen burner will be ... by the heat.

When the managing director resigned unexpectedly, the company struggled to replace him. FILL The company struggled ........... by the unexpected resignation of the managing director.

It was the most dangerous situation I had ever been in. A Never before ....... dangerous situation.

Concentrate on jobs for ..... you have an aptitude.

Some companies are ..... obsessed with profits that employees are under a lot of stress.

DISCOVER The authors draw on numerous recent ............... and discuss all sorts of topics.

Air can .................... as much as 99.8% of the material.

I don't want to come to the party. ............ all, I don't know the guy.

CIVILISE A number of ....... existed in different parts of Mexico.

They will be particularly helpful in the building and construction .....

Its use is currently limited, mostly to drilling operations and other .... environments.

INHABIT It's a very instructive guide to these early ...........

I eventually realised that the woman waving at me was an old friend. TURNED I couldn't at first see who was waving at me, but she .......... an old friend.