Task 1. Fill in:

acid, power, burn, toxic, low-fat, endangered, plant

1. petrol
2. yoghurt
3. species
4. rain
5.nesting boxes
6. station
7. fumes
Task 2. Fill in «much», «many», «any»
1.We have got butter.
2. There aren’t lemons left.
3.There are apples in the fridge.
4.You can see cars near the school.
5. Did you buy milk?

Task 3. Choose the right tense.
1. She has been studying/ has studied all day.
2. We walked/ have been going to the seaside last week.
3. She has studied/ has been studying on computer all morning.
4. A new fashion store has been opening/ has opened in our neighborhood
last weekend.
5. It’s cool. It has rained/ has been raining since morning.
Task 4. Fill in the blanks with the Present Perfect, Past Simple, Present
Perfect Continuous.
1. How long he (know) her?
2. I (be) at work yesterday.
3. Their parents (be) friends since their childhood.
4. They (buy) their flat last summer.
5. I already (do) housework.
6. The children (watch) cartoons for 2

It is Friday. It is seven o'clock in the morning. I am liying in bed and hearing my mothers words, "Cathy, get up! If you stay in bed longer,you will late for school." I get up but can't find anything. Where is my white blouse? Oh, mum didn't wash it yesterday. I put on a grey shirt and run downstairs. Now, I haven't any time for breakfast. " If I run all the way,I will be able to take a bus to school," I think. My mum is at the kitchen door with a sandwich in her hand. " You will be hungry when you come to school," she says. "Eat it on the way to the bus stop. Have a nice day,dear."

1.The author isn’t mentioned. Network. English for Communications students T. V. Kozhevnikova 2012. pp. 201-205

2. Switching technology

3. The aim of the article is to show the reader structure and stages of improvement in commutation technologies.

4. The research method used in the article is description.

5. At the dawn of telecommunication technologies, telecom operators manually switch the channels between subscribers, which significantly reduces the speed of the connection. Soon, this network received semi-automatic switching elements that were not as dependent on the human as the previous ones, which allowed decreasing delays in the connection between people. Switching networks have gone through many stages of development: from manual switching to electromechanical, semi-electronical and nowadays we used full electronic, digital method of switching that provides high connection and data transfer speeds.  

6. The article describes time beginning with 1878 to 1976 (or till our time)

7. The author’s conclusion is that communication systems, as well as methods of switching in these systems will be steadily improved further. Soon, we can observe that the packet data network will change on newly developed transmission standard’s, that will provide higher speed’s, security and quality of communication.