1. Helen speaks French so well because she (has lived) in France.
2. She ( lived) there last year.
3. The rain (has stopped) and the sun is shining in the sky again.
4. The rain ( stopped) half an hour ago.
5. Mary (has bought) a new hat.
6. I (bought) a pair of gloves yesterday.
7. The wind (has blown) off the man’s hat, and he cannot catch it.
8. The weather (has changed), and we can go for a walk.
9. The wind (changed) in the morning.
10. We ( travelled) around Europe last year.
Объяснение:
1. Елена так хорошо говорит по-французски, потому что она (жила) во Франции.
2. Она (жила) там в году.
3. Дождь (перестал) и солнце снова светит в небе.
4. Дождь (перестал) полчаса назад.
5. Мэри (купила) новую шляпу.
6. Вчера (купил) пару перчаток.
7. Ветер (сдул) шляпу человека, и он не может его поймать.
8. Погода (изменилась), можно пойти гулять.
9. Ветер (переменился) утром.
10. В году мы (путешествовали) по Европе.
The user is aware of the effects of different applications programs but operating systems are invisible to most users. They lie between applications programs,such as word processing, and the
hardware. The supervisor program is the most important. It remains in memory,therefore it is referred to as resident. Others are called non-resident because they are loaded into memory only when needed. Operating systems manage the computer's resources, such as the central processing unit,in addition , they establish a user interface, and execute and provide services for applications software.Although input and output operations are invoked by applications programs, they are carried out by the operating system.
Объяснение:
