1.
The main goal here is to test the ____ of this ____.
2.
Since porcelain is an extremely hard and ____ substance, it is used in dentistry to create ____ teeth.
3.
Fire-fighters are held in great ____ by society for saving the lives and ____ of others.
4.
___ travellers are used to delays at airports and usually await their flight ___ .
5.
____ analysis of many of the most famous paintings in European art ____ reveals them to be great imitations.