II. Объясните роль запятой.

1. Computer data should be backed up frequently and should be stored nearby in secure location.

2. Both keys are used to encrypt, and matching keys are used to decrypt the message.

3. Thus, the receiver uses four satellites to compute latitude, longitude, altitude, and time (in GPS).

4. Semipermanent information storage is also often used for archival purposes, but the media used can be overwritten.

5. With wireless communications people do not need to remain at a fixed location, such as a home or office, but instead can communicate with other people while traveling in a car or walking along a street.

6. Any website can contain hyperlinks to any other web site, so the differentiation one particular site from another, may sometimes be difficult for the user.

III. В следующих сложных предложениях найдите сложноподчиненные бессоюзные предложения.

1. Facebook was not the first social networking website, but its introduction in 2004 was the most influential in the development of the medium.

2. Pure or basic research aims to clarify scientific principles without a specific end product in view; applied research uses the findings of pure research on order to achieve a particular commercial objective.

3. Both Dalvik and native applications run within the same security environment, contained within the Application Sandbox.

4. We have been using plastic packaging for many years; however, next year we are moving to more environmentally-friendly materials.

5. Flash memory is used more as a hard drive than as RAM.

6. Hwang insisted he had no interest in profiting from his discoveries; indeed, he turned over his patent rights to the university and the government.

VI. Назовите парные и простые союзы, их функцию.

1. They speed up again as soon as they have passed.

2. Telecoms applications will soon be bundled together in much the same way as office application suites are today.

3. But the people who suffer most from the ₤ 600 million extra in taxes are the pensioners and working people.

4. These viruses replace either the programs that store information about the disk’s contents or the programs that start the computer.

5. Google will already run your email and host your documents, and its App Engine lets users run custom applications.

6. Computers and their many applications bring with them both economic and social changes.

IV. Найдите в тексте задания V. однокоренное слово к глаголу compute. Назовите другие однокоренные слова к этому глаголу.