Choose the best answer that is suitable for each blank or the underlined word or phrase.

Nobody knows exactly there is how much ________ left in the world.

Circle the word whose stress is on the first syllable.

Nowadays, people are thinking of _______ energy as an alternative.

Circle the word whose bold part is pronounced differently from those of the other three.

If we don’t start __________ energy now, it will be too late.

Circle the word whose stress is on the first syllable.

Circle the word whose bold part is pronounced differently from those of the other three.

Circle the word whose bold part is pronounced differently from those of the other three

Circle the word whose bold part is pronounced differently from those of the other three.

Circle the word whose stress is on the first syllable.

Circle the word whose bold part is pronounced differently from those of the other three.

Circle the word whose stress is on the first syllable.

Commonly, __________ is used for lighting in modern society.

Coal, oil and gas are some examples of __________ fuels.

Circle the word whose stress is on the first syllable.