----- Nội dung dịch tự động từ ảnh -----
Read the following passage carefully. Then choose the best
answer to each question. (5pts)
Aspirin's origins go back at least as early as 1758. In that year, Englishman Edward
Stone noticed a distinctive bitter flavor in the bark of the willow tree. To Stone,
this particular bark seemed to have much in common with "Peruvian Bark", which
had been used medicinally since the 1640s to bring down fevers and to treat
malaria. Stone decided to test the effectiveness of the willow bark. He obtained
some, pulverized it into tiny pieces, and conducted experiments on its properties.
His tests demonstrated that this pulverized willow bark was effective both in
reducing high temperatures and in relieving aches and pains. In 1763, Stone
presented his findings to the British Royal Society.
Several decades later, further studies in the medicinal value of the willow bark
were being conducted by two Italian scientists. These chemists, Brugnatelli and
Fontana, determined that the active chemical that was responsible for the
medicinal characteristics in the willow bark was the chemical salicin, which is the
active ingredient of today's aspirin.
The name "aspirin" is the trade name of the drug based on the chemical salicin,
properly known as acetylsalicylic acid. The trade name "aspirin" was invented for
the drug in the 1890s by the Bayer Drug Company in Germany. The first bottles of
aspirin actually went on sale to the public just prior to the turn of the century, in
1899.
76. According to the passage, aspirin originated
A. no later than 1758
B. sometime after 1785
D. no earlier than 1758
C. definitely sometimes in 1758
77. It can be inferred from the passage that Peruvian Bark
A. caused fevers
B. was ineffective in treating malaria
C. was described to the British Royal Society by Stone
D. was in use prior to aspirin
78. The pronoun "it" in line 5 refers to
B. willow bark
A. malaria
Society
79. The word "properties" in line 6 could best be replaced by
A. ownership
B. body
C. characteristics D. materials
30. What did the willow bark look like after Stone prepared it for his experiments?
A. It was in large chunks
C. It was a rough powder
C. effectiveness D. The British Royal
B. It was a thick liquid
D. It was in strips of bark