I. Write the correct modal verb: 1. I
ride a bike. I always fall off.
a. may not b. can't c. don't have to
2. You look sick, you
see a doctor.
a. should b. can c. may
3. Remember, you are in a library. You
speak loudly.
a. must b. mustn't c. don't have to
4. Don't forget to take an umbrella. It
rain later.
a. may not b. can't c. might
5. We
chew gum in class.
a. shouldn't b. must c. don't have to
6. You
make pancakes. I've already made some.
a. may not
b. can't c. don't have to
7. Students
take exams twice a year.
b. must c. may
8. Sorry, I come yesterday.
a. didn't have to b. can't c. couldn't
9. Students
borrow up to four books at a time.
10. You really smoke.
11. Tim
go to school tomorrow. It's Sunday.
12.
you help me with my homework, please?
13. I
go out tonight. I'm babysitting my little cousins.
14. We
hurry. I don't want to be late again.
15. you play swim as a child? No, I
16. He speak Spanish fluently. He's been there for only a week.
17. She's got plenty of time, so she
hurry.
18. You
leave now if you wish.
19.
you open the window a bit, please?
20. you play the guitar?
21. You practice more if you want to take part in the marathon.
22. You
say things like that to your sister.
a. can​

Speaking about new technologies I want to speak about computer and the internet. Millions of people around the world use Internet every day. I have the internet at home and enjoy looking for useful information for me.

Internet is very useful, because it is a huge base of data and knowledge, where you can find any thing you want from movies and music of interest to the vast number of books, newspapers and magazines.

Internet helps to learn lots (или a lot). (можно по-другому: Internet helps studing.)

To find more information, download the required essay, watch video about some books which you have already read, everything can be done through the Internet.

Email is one of  the advantages of the Internet.

This online service is cheaper than regular mail, and it works much faster.

 You never lose touch with loved ones, wherever they are using such mean of communicatoin.

I have a personal e-mail and have an oppotunity to chat with my friends from other cities and countries.

 Nowadays there are very different popular social networks where communication with your friends and relatives also is not difficult.

Today there are many different Internet - competitions for different subjects which give students the opportunity to participate even in international competitions.

On the other hand I think that the Internet  becomes a way of a person life and it is very harmful for our health. Many teenagers spend a long of time sitting at the  computers and spoiling theirselfves eyes. I don't mean that I am against the Internet, but it should have  reasonable limits.

Говоря о новых технологиях, я хочу поговорить о компьютере и интернете. Миллионы людей по всему миру используют интернет каждый день.
У меня есть интернет дома и я с удовольствием ищу полезную информацию для меня.
Интернет очень полезен, потому что это огромная база данных и знаний, где вы можете найти любую вещь, которую вы хотите -  от фильмов и музыки, которая вам интересна,  огромное количество книг, газет и журналов.
Интернет узнать многое. Чтобы получить дополнительную информацию, скачать необходимые эссе, посмотреть видео о некоторых книгах, которые вы уже прочитали, все это можно сделать через интернет.
Электронная почта является одним из преимуществ интернета.
Этот сервис онлайн дешевле, чем обычная почта, и она работает намного быстрее.
У меня есть личный адрес электронной почты, так что я имею возможность общаться со своими друзьями из других городов и стран.

 В настоящее время существует очень разных популярных социальных сетей, где связаться с друзьями и родственниками также не сложно. Сегодня существует много различных соревнований и конкурсов в интернете  по различным предметам, которые дают студентам возможность принять участие даже в международных конкурсах.

С другой стороны, я думаю, что интернет становится образом жизни человека, и это очень вредно для нашего здоровья. Многие подростки проводят много времени, сидя за компьютерами и портят зрение. Я не хочу сказать, что я против интернета, но его использование должно иметь разумные пределы.

1.When did men observe most striking changes?

2.What was the value of this changes?

3.What kind of substances did ancients know?

4.Directed experimentation appeared with the rise of alchemy, didn't they?

5.What did alchemists look for?

6.Did they want to change common metals into gold or into silver?

7.The misterious substance was called philosopher’s stone, wasn't it?

8. Was the gold the main value?

9.  which  elixir could bring back youth?

10. What was results of alchemists' experiments?

11. Why alchemists could not lead to the development of a science?

12. When was chemistry born as a science?