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 28 to 34.

  The iPhone was released in 2007. E-books reached the mainstream in the late 1990s. Printed books have been around since the 1450s. But how did writing move around before then? After all, a book - electronic or not - is simply a mechanism for making written information portable. And our ancestors were as eager to take their reading on the go as we are. Here are some ways that people used to record information and carry it around.

  In Mesopotamia, in the 3rd millennium BCE, various ancient peoples began scribbling on small tablets that were several inches long. Scribes used a stylus to make marks on wet clay tablets, w hich were then dried outside or baked so as to make them long-lasting. Some particularly important texts ran across multiple tablets. The type of writing used by these scribes was cuneiform, and it sustained the production of these tablets for some 2,000 years.

  The Chinese also created tablets that were made from bamboo or wood and were lashed together with the equivalent of rope. Records suggest that these may have emerged by 1300 BCE, if not before, but many simply rotted away or otherwise decayed. The emperor Shihuangdi also didn’t help in 213 BCE when he ordered that most books not in his possession be burned. During roughly the same time, the Chinese also created scrolls made of silk, though these scrolls were not always rolled into a cylindrical form; some of the documents written on silk that were found, for example, at Mawangdui, an archaeological site in southeastern China that dates to the 2nd century BCE, were found folded into rectangles. The texts on these tablets and scrolls covered a wide range of topics, from medicine to poetry to philosophy.

  Wax tablets were a riff on the ancient Mesopotamian clay tablets, courtesy of the ancient Greeks and Romans. Clay tablets could be awkward to work with; papyrus could be a pain to prepare and store. But filling a wooden block with hot wax that, after it cooled, provided a smooth soft writing surface? Simple. And cheap too. Permanence was a bit of a problem, but it was also an advantage: the wax could be remelted or scraped smooth, and the tablet was ready for use again. The Greeks and the Romans, and medieval Europeans after them, used these tablets for some important legal documentation, but their primary advantage was flexibility—very much like a paper (or electronic) tablet today.

(Source: https://britannicalearn. com)

According the passage, Chinese people _____________.

A. created bamboo tablets and silk scrolls almost simultaneously 

B. created bamboo tablets before they used silk scrolls 

C. created silk scrolls very roughly before they used bamboo tablets 

D. didn’t use silk scrolls until they created bamboo tablets

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.

Upon reaching the destination, a number of personnel is expected to change their reservations and proceed to Hawaii.

A. reaching

B. proceed to

C. is

D. to change

Điện phân với hai điện cực trơ 200 ml dung dịch chứa hỗn hợp NaCl 1,2 M và CuSO₄ 1M trong thời gian t giây, I = 5A thì thu được dung dịch X và V lít hỗn hợp khí Y ở anot (đktc). Nhúng một thanh sắt vào X đến khi phản ứng xảy ra hoàn toàn rồi nhấc thanh sắt ra đem cân lại thấy khối lượng thanh sắt không bị thay đổi. Kết luận nào sau đây là đúng?

A. Thanh Fe không có phản ứng với dung dịch X

B. t = 5790

C. t = 5018 giây

D. V = 2,688 lít

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

Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion. The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.

Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.

According to the passage, an organisms without hard body parts____

A. is not heavy enough to sink below the surface

B. is not attractive to predators

C. is not likely to appear in the fossil record

D. takes a long time to decay

Chất nào trong số các chất sau đây, có nhiệt độ nóng chảy cao nhất?

A.  C H 3 C H 2 O H

B. H₂NCH₂COOH

C.  C H 3 C H 2 N H 2

D. C₂H₃COOH

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 33 to 37.  Fill in the appropriate word in question 35

Long ago, Chinese people didn’t say, “How are you” when they met each other or saw their friends. They said,” (33)_____ you eaten your rice today?”. Eating rice (34)_____ such an important part of daily life in China!

Rice is still one of the (35)_____ important kinds of food in the modern world. Nearly half the people that live on our planet eat it every day and in some countries, an adult cats more than 100 kilos of rice each year.

We think that people first (36)______ rice in India. In China, people began eating rice about 5,000 years ago. Rice wasn’t eaten in North America until 17th century, but many Americans prefer to eat pasta these days (37)_________ only eat about 2 kilos of rice per year.

A. most

B. both

C. much

D. best