Sceptics claim that looking for alien forms of life in space is like squaring the ________ as they do not exist.

Researchers have ________ to the conclusion that personality is affected by your genes.

He is writing a letter of acceptance to the employer with the hope to get his favorite position in the company.

Mark the letter A, B C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. 

Unless we do something now, hundreds of plant and animal species will ________.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 

I hope these machines will have worked very well ________.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.