Rewrite each of the following sentences beginning as shown, so that the meaning stays the same.

If you don’t try to work hard, you will fail the exam.

à Unless .

Read the following passage and choose the best answer A, B, C, or D to fill in each gap. Write the answers on your answer sheet.

From the 20^th to the 21^st century, there have been (31)  significant changes in the majority of countries around the world.

Read the following passage and choose the most suitable word from the ones given in the box to fill in each gap. Write the answers on your answer sheet.

Choose the word whose stress pattern is different from that of the others in the same line and write A, B, C, or D on your answer sheet.

Choose the word whose stress pattern is different from that of the others in the same line and write A, B, C, or D on your answer sheet.

Choose one word whose underlined part is pronounced differently from the others and write A, B, C, or D on your answer sheet to indicate the answers.

Choose one word whose underlined part is pronounced differently from the others and write A, B, C, or D on your answer sheet to indicate the answers.

 Which of the following can be the best title for the passage?