Откройте скобки и поставьте правильную форму participle i
1. when ….. (to seek) an explanation, we sometimes find more than one explanation.
2. ….. (to appoint) the head of the laboratory he went on his researches on the behavior of the particles (to influence) by the magnetic field.
3. for reproduction ….. (to fluctuate) voltages induced in a coil wounded on the magnet.
4. he was ….. (to work) at his scientific paper when i rang him up.
5. the substances to be separated have similar chemical and physical properties, ….. (to include) the manner in which they partition between two phases.

1. English has become a world language because of recognition of English as "official" language of computing, sciences, technologies, aviation, etc. and success of music in English not just from the UK and US, but also from countries where English is not an official language. 
2. People who speak English, have more opportunities to get success in different areas of employment.
3. We use dictionaries to find out the translation of the words of a foreign language, because the language is not our first language.
4. It contributes to the development of your speech and the perception of a foreign language quickly and efficiently.
5. Russian people are learning English now, because this language is a world language, we need to know English if we want to get success. 

1. What touching story! 2. Narrow streets of this city remind me Venice. 3. The queen of Great Britain reigns, but doesn't govern. 4. The most known crowns of the British monarchs can be seen in the Tower. 5. Who in your family is interested in policy? 6. How many parks in London and about London the royal family owns? 7. Queen Elizabeth II has some official residences in Great Britain, one of them is in Scotland. 8. A Hyde park, Ridzhents-park and St. James's park - royal parks of London. 9. Many places in London are closely connected with royal family.