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

I didn't think his comments were very appropriate at the time.

A. suitable 

B. correct 

C. exact 

D. right 

Cho vào ống nghiệm 2 ml etyl axetat, sau đó thêm tiếp 1 ml dung dịch NaOH 30% quan sát hiện tượng (1); lắp ống sinh hàn đồng thời đun sôi nhẹ trong khoảng 5 phút, quan sát hiện tượng (2). Kết quả hai lần quan sát (1) và (2) lần lượt là

A. Chất lỏng tách thành hai lớp, chất lỏng đồng nhất.

B. Chất lỏng tách thành hai lớp, chất lỏng tách thành hai lớp

C. Sủi bọt khí, chất lỏng tách thành hai lớp.

D. Chất lỏng đồng nhất, chất lỏng tách thành hai lớp

Thạch cao sống có công thức là:

A. CaSO₄.2H₂O 

B. CaSO₄.H₂O 

C. CaSO₄ 

D. 2CaSO₄.H₂O

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30 to 34.

Alfred Bernhard Nobel, a Swedish inventor and philanthropist, left most of his vast fortune in trust as a fund from which annual prize could be awarded to individuals and organizations that had achieved the greatest benefit to humanity in a particular year. Originally, there were six classifications for outstanding contributions designated in Nobel’s will including chemistry, physics or medicine, literature, and international peace.

The prizes are administered by the Nobel Foundation in Stockholm. In 1969, a prize for economics endowed by the Central Bank of Sweden was added. Candidates for the prizes must be nominated in writing by a qualified authority in the field of competition Recipients in physics, chemistry, and economics are selected by the Royal Swedish Academy of Sciences; in physiology or medicine by the Caroline Institute; in literature by the Swedish Academy; and in peace by the Norwegian Nobel committee appointed by Norway’s parliament. The prizes are usually presented in Stockholm on December 10, with the King of Sweden officiating, an appropriate tribute to Alfred Nobel on the anniversary of his death. Each one includes a gold medal, a diploma, and a cash award of about one million dollars.

The word “will” in the first paragraph refers to_____.

A. Nobel’s wishes

B. a legal document

C. a future intention

D. a free choice

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks from 25 to 29. Fill in the appropriate word in question 25

In recent years there have been many articles on air pollution in newspapers and magazines. Scientists all over the world have warned that our atmosphere is (25) ______ more and more contaminated, and that Man, through his carelessness, may run out of pure air to breathe.

Automobiles and industries mainly account (26) _______ air pollution in most cities.  They pour into the air such gases as carbon monoxide, sulfur and nitrogen oxides, (27) _____ are very harmful to humans. (28) ____ still, these gases, a series of chemical changes, turn into toxic acids. They fall down in “acid rains”, raising the acidity in the air, soil and water to dangerous levels and affecting not only tress but also fish and other wildlife. Many industrial countries in Europe and North America have suffered bad effects (29) ______ those “rains”.

Surely, Man faces no more urgent problem than that of saving his own survival. Scientists, social organizations and governments shout sit down together to solve the air pollution problem.

A. got 

B. become

C. becoming 

D. changing