The authorities _________ actions to stop illegal purchase of wild animals and their associated products effectively. However, they didn't do so. 

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.

Fifty minutes are the maximum length of time allotted for the exam. 

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

The U23 Vietnamese football team's performance has garnered _______ from around the world and shown promise for Vietnam's soccer horizon. 

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

The government is encouraging everyone to save water by not washing their cars. 

Which of the following is NOT true according to the passage?

Having been identified the causes of global warming, scientists have worked out some solutions to reduce its effects. 

Rather than disturb the meeting, I left without saying goodbye.