Complete the sentences using the correct form of the present perfect tense. 1. I several books about sailing and I am quite fascinated by the sport . (READ)
2. You look absolutely exhausted. What ? (YOU DO)
3. He that book for over two weeks and he yet. He's such a slow reader . (READ, NOT FINISH)
4. My sister in Norwich for two months. She seems to like it there and is not planning to leave. (LIVE)
5. My dad a new job. (JUST START)
6. You should put some boots on. It for several days now and the ground is pretty muddy. (RAIN)
7. your homework yet ? You on it for hours . (YOU FINISH , WORK)
8. Maria for a job since she left school last summer. She still one . (LOOK, NOT FIND)
9. They TV the whole evening. It's their favourite film and they it several times. (WATCH, SEE)
10.I him about his new girl friend twice this week. He doesn't seem to want to answer. (ASK)
11.I my driving test. (JUST PASS)
12.Where ? - At the doctor's. I ill lately (YOU BE, BE)

ответ:Hello, Ben.

I was very glad to receive your letter.I am looking forward to my summer holiday.I am very tired. I would like to visit England.I know a lot about this country and I want see everything with my own eyes. I would like to see the Big Ben, The Thames, The Houses of Parliament, to visit Madam Tussaud's Museum and London Eye, to walk in London parks. What about you? What places of interest would you like to see in Russia? Would you like to meet with you?

Sorry, I have to go. Best wishes,

Биотехнология - это использование искусственных методов для модификации генетического материала.живых организмов или клеток для производства новых соединений или выполнения новых функций. Биотехнология использовалась для улучшения животноводства и сельскохозяйственных культур с самого начала ведения сельского хозяйства посредством селективной селекции. С момента открытия структуры ДНК в 1953 году, и особенно с момента разработки инструментов и методов для манипулирования ДНК в 1970-х годах, биотехнология стала синонимом манипулирования ДНК организмов на молекулярном уровне. В первую очередь эта технология применяется в медицине (для производства вакцин и антибиотиков) и в сельском хозяйстве (для генетической модификации сельскохозяйственных культур). Биотехнология также имеет множество промышленных применений, таких как ферментация, обработка разливов нефти и производство биотоплива, а также многие бытовые применения, такие как использование ферментов в стиральных порошках.