Read these word combinations and sentences aloud.
at the city dump
at the town dump
to take rubbish to the dump
 
pollution of the pond
dangerous pollution
environmental pollution
 
to protect from snow
to protect one’s interests
to protect your skin against the sun
 
to pollute air
to pollute rivers
to pollute soil
 
polluted fields
polluted rivers
polluted forests
 
to waste one’s time
to waste one’s money
to waste one’s words
 
It is necessary to do the job at once.
I won’t stay here longer than it is necessary.
We are going to send you all the papers if necessary.