【正文】 outh until spring. Their tracks are so wellworn that they are clearly visible from the air. Another migrating mammal is the Alaska fur seal. Theses seals breed only in the Pribilot Islands in the Bering Sea. The young are born in June and by September are strong enough to go with their mothers on a journey of over 3,000 miles. Together they swim down the Pacific Coast of North America. The females and young travel as far as southern California. The males do not journey so far. They swim only to the Gulf of Alaska. In the spring, males and females all return to the islands, and there the cycle begins again. Whales are among the greatest migrators of all. The humpback and blue whales migrate thousands of miles each year from the polar seas to the tropics. Wales eat huge quantities of plankton. These are most abundant in cold polar waters. In winter, the whales move to warm waters to breed and give birth to their young. 81. From the passage we can learn that___. A. people migrate like animals B. only birds migrate C. the females fur seals migrate only to the Gulf of Alaska D. not all mammals migrate 82. The phrase “ An example” underlined in Paragraph 1 refers to an example of a___. A. migratory mammal B. place where animals migrate C. migrating birds D. person who associates migration with birds 83. All the mammals are mentioned as migrating ones EXCEPT___. A. caribou B. fin whale C. reindeer D. Alaska fur seal 84. Where can you see from the air the migration of the mammals? A. In the Pribilot Islands. B. In the Bering Sea C. In southern California D. In northern Canada 85. Which of the following is NOT true? A. Wales breed in winter. B. Young whales are given birth in cold waters. C. Alaska fur seals give birth to the young only in one area. D. Alaska fur seals are born in warm weather. 86. Together___ of Alaska fur seals swim down the Pacific Coast of North America. A. mothers and the young B. fathers and the young C. parents and the young D. seals and whales 87. Which of the following is NOT described inn the passage? A. Whales migrate to breed and give birth to their young. B. Whalewatching in Boston in summer is attracting. C. Seals breed in the north before migration. D. Reindeer feed on grass. 88. Whales live on___. A. tiny plants and animals in the sea. B. the grassy slopes of northern Canada. C. their young in cold winter. D. the abundant seafood in tropic waters. 89. How many kinds of migrating mammals are mentioned in the passage? A. Four B. Three C. Two D. One 90. What is the best title of the passage? A. Three Types of Whales B. Birds Migration C. Mammals Also Migrate D. Several Kinds of Migration (5) Electronic mail has bee an extremely important and popular means of munication. Te convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of unsolicited mercial electronic mail. Unsolicited mercial electronic mail is currently estimated to account for over half of all electronic mail traffic, up from an estimated 7 percent in 2022, and the volume continues to rise. Most of these messages are fraudulent or deceptive in one or more respects. The receipt of unsolicited mercial electronic mail may result in costs to recipients who cannot to refuse to accept such mail and who incur costs for the storage of such mail, or for the time spent accessing, reviewing, and discarding such mail, or for both. The receipt of a large number of unwanted messages also decreases the convenience of the electronic mail and creates a risk that anted electronic mail messages, both mercial and nonmercial, will be lost, overlooked, or discarded amidst the larger volume of unwanted messages, thus reducing the reliability and usefulness of electronic mail to the recipient. Some mercial electronic mail contains material that many recipients may consider vulgar or pornographic in nature. The growth in unsolicited mercial electronic mail imposes significant moary costs on providers of Inter access services, businesses, and educational and nonprofit institutions that carry and receives such mail, as there is a finite volume of mail that such providers, businesses, and institutions can handle without further investment in infrastructure. Many senders of unsolicited mercial electronic mail purposefully disguise the source of such mail. Many senders of unsolicited mercial electronic mail purposefully include misleading information in the messages’ subject lines in order to induce the recipients to view the messages. While some senders of mercial electronic mail messages provide simple and reliable ways for recipients to reject (or ‘ optout’ of) receipt of mercial electronic mail from such senders in the future, other senders provide no such ‘ optout’ mechanism, or refuse to honor the requests of recipients not to receive electronic mail from such senders in the future, or both. Many senders of bulks unsolicited mercial electronic mail use puter programs to gather large numbers of electronic mail addresses on an automated basis from Inter websites or online services where users must post their addresses in order to make full use of the website or service. The problems associated with the rapid growth and abuse of unsolicited mercial electronic mail cannot be solved by the government alone. The development and adoption of technological approaches and the pursuit of cooperative efforts with other countries will be necessary as well. 91. According to the passage, efficiency of is threatened by___. A. heavy traffic B. fraudulent messages C. large volume of messages D. increasing amount of unwanted 92. Which