Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following exchanges. 

Lucy is talking to Huong, her Vietnamese friend, about air pollution in Hanoi.

Lucy: "Is there anything we can do about the toxic air pollution in Hanoi recently?"

Huong: " ____________, but the only thing we can do is to avoid outdoors and wear masks."

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

As the exams drew nearer Manh knew it was time to move up a gear and started studying late into the evening

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

The boy did a good ________ by helping the blind man cross the road.

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 combination of rain and greasy surfaces made driving conditions treacherous

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the three in pronunciation in each of the following questions.

Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of the primary stress in each of the following questions

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

________ species must be saved in order to maintain the balance in the ecosystem