Đề thi HK1 môn Tiếng Anh 12 năm 2021-2022 Trường THPT Lý Tự Trọng

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

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 Nanotechnology is the creation and use of materials or devices at extremely small scales. These materials or devices fall in the range of 1 to 100 nanometers (nm). One nm is equal to one-billionth of a meter (0.000000001 m), which is about 50,000 times smaller than the diameter of a human hair. Scientists refer to the dimensional range of 1 to 100 nm as the nanoscale, and materials at this scale are called nanocrystals or nanomaterials. The nanoscale is unique because nothing solid can be made any smaller. It is also unique because many of the mechanisms of the biological and physical world operate on length scales from 0.1 to 100 nm. At these dimensions materials exhibit different physical properties: thus scientists expect that many novel effects at the nanoscale will be discovered and used for breakthrough technologies. A number of important breakthroughs have already occurred in nanotechnology. These developments are found in products used throughout the world. Some examples are catalytic converters in automobiles that help remove air pollutants, devices in computers that read from and write to the hard disk, certain sunscreens and cosmetics that transparently block harmful radiation from the Sun, and special coatings for sports clothes and gear that help improve the gear and possibly enhance the athlete's performance. Still, many scientists, engineers, and technologists believe they have only scratched the surface of nanotechnology's potential. Nanotechnology is in its infancy, and no one can predict with accuracy what will result from the full flowering of the field over the next several decades. Many scientists believe it can be said with confidence, however, that nanotechnology will have a major impact on medicine and health care: energy production and conservation: environmental cleanup and protection: electronics, computers, and sensors: and world security and defense. (Adapted from Encarta DID 2009)

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 In the early twentieth century, an American woman named Emily Post wrote a book on etiquette. This book explained the proper behavior Americans should follow in many different social (8) ______, from birthday parties to funerals. But in modern society, it is not simply to know the proper rules for behavior in your own country. It is necessary for people (9) ______ work or travel abroad to understand the rules of etiquette in other cultures as well. Cultural (10) ______ can be found in such simple processes as giving or receiving a gift. In Western cultures, a gift can be given to the receiver with relatively little ceremony. When a gift is offered, the receiver usually takes the gift and expresses his or her thanks. (11) ______, in some Asian countries, the act of gift-giving may appear confusing to Westerners. In Chinese culture, both the giver and receiver understand that the receiver will typically refuse to take the gift several times before he or she finally accepts it. In addition, to (12) ______ respect for the receiver, it is common in several Asian cultures to use both hands when offering a gift to another person. (Source: Reading Advantage by Casey Malarcher)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions

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