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.

They have carried out exhausting research into the effects of smartphones on schoolchildren’s behaviour and their academic performance.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

“Don’t forget to submit your assignments by Thursday,” said the teacher to the students.

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

Michael rarely returns to his hometown, _______?

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.

Most workers seems to be happy with their new working conditions.

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

You must not _______ any step in the process; otherwise, you would not be able to cook the dish properly.

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

Susan has achieved great _______ in her career thanks to her hard work.

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.

His friends supported and encouraged him. He did really well in the competition.