Give the correct forms of words in the bracket.

The telephone is considered to be one of

the most useful

achievements. (SCIENCE)

Choose the word that has the underlined part pronounced differently from the others.

Choose the word that has the underlined part pronounced differently from the others.

Choose the word whose stress is put differently from that of the others.

Choose the word whose stress is put differently from that of the others.

Choose the word whose stress is put differently from that of the others.

Mark the letter A, B, C or D on your answer sheet to choose from the best answer to complete each sentence.

Some plants and animals are referred to as ______ organisms because they are extremely small.

Mark the letter A, B, C or D on your answer sheet to choose from the best answer to complete each sentence.

Nearly 1,000 of the world's bird species are threatened with ________.