I (saw/was seeing) you in the park yesterday. You (sat/ were sitting) on a bench​

What are you doing here now? I  am looking at the window. (сейчас)
Every day John winds his watch at 10 o"clock in the evening. Lena usually helps her mum. (обычные действия)
She has been helping her mum since the morning. (известно, как долго длится процесс)
They have already washed the floor and dusted the furniture. (действие свершилось и есть результат)
This is a factory where my father works. (обычное действие)
He has been working there for 10 years already. (известно, как долго длится процесс) 
He has just received a message. (действие свершилось и есть результат)
Where is he? He is working in the garden now.  (сейчас)
He has been working there since breakfast. (известно, как долго длится процесс) 
I haven`t fond a book yet. (результат)
I have been looking for it for half an hour. (известно, как долго длится процесс) 
I often go to the library and borrow new interesting books. (обычное действие) 
She has been written a compositions for 2 hours already, but hasn`t finished it yet. (известно, как долго длится процесс; но результат не достигнут) 
Listen! My sister is singing.  (сейчас)
I have been waiting for a letter from my cousin for a month, but haven`t received it yet. (известно, как долго длится процесс; но результат не достигнут) 
Every day I go for a walk to the park. My friend often goes with me. (обычное действие) 
You have been playing with a ball for an hour. Go home and do your homework.
  (известно, как долго длится процесс)
I live in St.Peterburg. (обычное действие) 
I have been living here for 10 years already.  (известно, как долго длится процесс)
What are you doing here now? I reading an article. (сейчас)
I have just received a letter from my granny. (результат) 

Natural DisastersПриродные катастрофыNatural disasters such as flood, fire, tornado, earthquake, tsunamis are becoming more and more frequent on our planet. In short description a natural disaster is a result of a natural hazard, which has a negative effect on human beings. These geologic processes can lead to serious consequences such as loss of life, property damage, economic problems. Certain areas are more exposed to natural disasters. For example, most of New Zealand’s coastline is exposed to tsunami hazard, while the Far East region is exposed to floods. Being aware of possible dangers, people should be prepared to protect themselves, their families and communities. Two important preparation steps are the developing of emergency plan and assembling a supply kit. However, all the known disasters have unique nature and should be approached separately. Some of the common natural hazards are as follows: earthquake, flood, drought, heat wave, hurricane, volcanic eruption, hailstorm, tornado, tsunami, landslide, wildfire, blizzard. I’d like to tell you a bit more about floods, hurricane and earthquakes. A flood is an overflow of water that submerges land. In severe cases it can result in human and animal deaths. Very often the crops are destroyed, which brings famine. A hurricane is a severe tropical cyclone or storm that often occurs in certain parts of the Atlantic and Pacific Oceans. This destructive hazard can lead to changes in weather and economy. It can also result in heavy rains, thunderstorm, flood or even tornado. An earthquake is the result of a sudden collision among the tectonic plates of the Earth. Such collision leads to massive and occasionally deathly vibrations. However, learning about these specific threats and the measures, which should be taken, can save many lives.