We (know) him since 2013A have knownB knowedC knew​

We have known him since 2013.

before -ing ...

2. Think carefully before answering the question. / Before answering the question, think carefully.

3. Mary put on her glasses before reading the letter. / Before reading the letter, Mary put on her glasses.

4. The man took off his coat before getting into the car. / Before getting into the car, the man took off his coat.

after -ing ...

5. We were very tired after walking for three hours. / After walking for three hours, we were very tired.

6. I felt sick after eating too much chocolate. / After eating too much chocolate, I felt sick.

7. I understood the book better after reading it a second time. / After reading the book a second time, I understood it better.

8. John worked in a department store for two years after leaving school. / After leaving school, John worked in a department store for two years.

Тут все нужен походу англ.яз?Кхм..Я готова

I'd like to tell you about internet. So, in our life internet is very important think. I spend a lot of time in the internet. Sometimes i need some information for my studing, sometimes i just play games there of chat with my friend. Ofcourse all it are pluses of internet, but there are also minases. for example many peoplke have internet dependence. They just can't stan up and take  rubbish шт garbage can. It come with time, but if you had ше affairs are bad. Thats all i would like to tell you about internet.

Удачи!