شرکت در آزمون آنلاین
انگلیسی 3
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درس سوم
| آزمون شماره 2509
1
The nation's fuel ........................ will not last forever . Using renewable energies is essential.
2
Using of ................................. excessively can put both our lives and animals in danger .
3
People are continuously buying more products and building more houses. Fresh water, oil and natural gas are just some of the resources which are in ....... .
4
The main sources of .......... energy all over the world are known as the same as each other including wind, water and sun.
5
Many believe that this discovery may hold the ....... to our understanding of the universe.