Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29.
One of the most important inventions in the development of science and medicine was the microscope. It was (25) ___________ the principle that light could be "refracted" or bent, by a glass lens. It was soon discovered that tiny objects could be magnified (26) ___________ size when viewed through a glass lens that had been ground and polished in a specific (27) ___________ .
Although the principle was known to the Chinese as early as 1000 A.D, it was not until the 13th and 14th centuries in Europe (28) ___________ it was put to practical use in the form of eyeglasses. In Europe the first microscope was invented by brothers Zacharias and Hans Janssen, two Dutch eyeglass-makers, around 1590. They built a "compound" microscope, so called because of its two lenses. The most significant development and use of the microscope during this period, however, belongs to another Dutch optician, Antonie van Leeuwenhoek. Bom in Delft, Holland, he became skilled at (29) ___________ very sharp and accurate magnifying lenses.
The word or phrase which best fits the gap (28) is...
A. when
B. than
C. then
D. that
One of the most important inventions in the development of science and medicine was the microscope. It was (25) ___________ the principle that light could be "refracted" or bent, by a glass lens. It was soon discovered that tiny objects could be magnified (26) ___________ size when viewed through a glass lens that had been ground and polished in a specific (27) ___________ .
Although the principle was known to the Chinese as early as 1000 A.D, it was not until the 13th and 14th centuries in Europe (28) ___________ it was put to practical use in the form of eyeglasses. In Europe the first microscope was invented by brothers Zacharias and Hans Janssen, two Dutch eyeglass-makers, around 1590. They built a "compound" microscope, so called because of its two lenses. The most significant development and use of the microscope during this period, however, belongs to another Dutch optician, Antonie van Leeuwenhoek. Bom in Delft, Holland, he became skilled at (29) ___________ very sharp and accurate magnifying lenses.
The word or phrase which best fits the gap (28) is...
A. when
B. than
C. then
D. that
Cấu trúc: It was not until + S + V2/ed ... + that + ... (Mãi cho đến khi .. .thì...)
"...it was not until the 13th and 14th centuries in Europe that it was put to practical use in the form of eyeglasses" (nhưng mãi cho đến thế kỉ 13 và 14 thì ở châu Âu nó mới được đưa vào sử dụng thực tiễn dưới hình thức kính mắt.)
"...it was not until the 13th and 14th centuries in Europe that it was put to practical use in the form of eyeglasses" (nhưng mãi cho đến thế kỉ 13 và 14 thì ở châu Âu nó mới được đưa vào sử dụng thực tiễn dưới hình thức kính mắt.)
Đáp án D.