Закончите предложения 1. … has served for almost 150 years as a key to discovering new elements and it has retained its key capacity until now. 2. His lectures were always listened to with great … 3. … began to write a great text book of chemistry, known in its English translation as "Principles of Chemistry" Hard work preceded it. Mendeleyev made thousands of experiments and calculations, wrote a lot of letters, studied many reports. 4. All those data were being brought together … 5. … earned him lasting international fame. 6. … were being brought together and grouped in a special way. 7. … serves as a basis for thousands of researches. 8. It is studied by philosophers, historians, teachers …
-Hello, I've heard that recently you've visited North America! Where exactly have you been and what have you seen there?
-That's right I've been to the United States. I've visited their largest state - Alaska. It's a very interesting place as lots of plains and snow deserts are located there.
-Wonderful, have you been to Hawaii too?
-Yes, USA is a big county, there are fifty states there. Hawaii is a federal district located in Pasific Ocean. We've had a trip to that island as well.
-That's lovely. Where are you going next year?
-I'm taking a trip to Dominican Republic.