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As the shortage of certain metals approaches, others must be found to take their ______

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certificate of damage; certificate of shortage; certificate of cleanliness  certificate of cleanliness; certificate of damage; certificate of shortage  certificate of shortage; certificate of cleanliness; certificate of damage  certificate of cleanliness; certificate of damage; certificate of shortage  
a shortage of refrigerant in the system  air in the system  an accumulation of liquid refrigerant in the crankcase  a shortage of oil in the crankcase  
The shortage of energy and air pollution.  The shortage of energy and the shortage of empty land for holding garbage.  Air pollution and the shortage of empty land for holding garbage.  Air pollution and the shortage of fossil fuel.  
excessive condenser cooling water  warm food in the refrigerator  a shortage of refrigerant  s shortage of compressor oil  
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be a shortage of    have a shortage of    be short of    be in short of  
a shortage of compressor oil  warm food in the refrigerator  excessive condenser cooling water  a shortage of refrigerant  
A not-large-enough income.  Nothing is left over to put away.  The increasing cost of living.  A shortage of certain goods.  
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