Practical english for the third-year

 Task 3.
 Match the words to the definitions.  
Fumes  /  solvent  /  stopcock  /  fibres  (B.A.  fiber)  /  inadvisable  /  soak  /  contaminate  /  impurity  / 
sample / cork / clamps  
1) smoke, vapour, or gas especially when irritating or offensive _____________  
2) usually a liquid substance capable of dissolving or dispersing one or more other substances __  
3) a device used for controlling or stopping the flow of a liquid or gas through a pipe _______ 
4) plant material that cannot be digested but that helps you to digest other food ___________  
5) not advisable, not wise ____________  
6) to put (something) in a liquid for a period of time ________________  
7) to soil, stain, corrupt, or infect by contact or association ________________  
solution       paper towel     detergent      glassware        gloves        milk      tap water 
rinse        impurities       evaporate     condense    fumes      solvent     brush    solute