Complete the sentences with the Present Perfect or Present Perfect Continuous forms of the verbs in brackets. 1 You look tired! (you/work) in the garden?

2 Ann (clean) the house for three hours. Let's help her.

3 How much (Ann/spend) on her toys?

4 The house smells wonderful! (Mum/bake) a cake?

5 How long (Tom/save) to buy a new mobile phone?

6 Kate (go) to the museum. She'll be back in an hour.

7 My sisrer (study) very hard recently.

8 We (not/buy) all our birthday presents yet.

9 My Dad (never/see) a crocodile.

10 (you/ever/eat) oranges?

Murat Abenovich Aitkhozhina - a specialist in the field of molecular biology and biochemistry, academician of the Academy of Sciences of the Kazakh SSR (1983), Doctor of Biological Sciences (1977), Professor (1980), winner of the Lenin Prize (1976), a disciple of Academician A. Spirin. Biography In 1962 he graduated from the Kazakh State University named after SM Kirov in 1965 - graduate of Moscow State University named after MV Lomonosov. In 1965-1967 he worked as a junior researcher in the years 1967-1969 as a senior research associate at the Institute of Botany of the Academy of Sciences of the Kazakh SSR. In 1969-1978 years - head of the laboratory, in the years 1978-1983 - Director of the Institute of Botany of the Academy of Sciences of the Kazakh SSR. In 1983-1987 years - Director of the Institute of Molecular Biology and Biochemistry, Academy of Sciences of the Kazakh SSR. In 1986-1987 - President of the Academy of Sciences of the Kazakh SSR.Contribution to science Aitkhozhina Murat was the founder of molecular biology and biotechnology in Kazakhstan. Aitkhozhina one of the first in the world of science conducted a comparative study of the protein synthesizing system in higher organisms, engaged in the search and study of physical and chemical properties informosom in plant cells in the group of Academician A. Spirin. Group opened informosom plant classes - free cytoplasmic, polysome-associated and nuclear, including RNA-binding proteins. In 1983 Aitkhozhina organized by the Institute of Molecular Biology and Biochemistry, Academy of Sciences of the Kazakh SSR. In 1987, it was organized by the Kazakh Agricultural Biotechnology Center, which works on the cellular and genetic engineering of plants.Murat Aitkhozhina the first to introduce a course in molecular biology and a number of special courses for students of biological faculty of Kazakh State University. Under the leadership of Aitkhozhina it was designed set of instruments for the automation of molecular biological experiments, which was protected by 15 copyright certificates and 16 patents in the leading countries. Awards Lenin Prize (1976) - for the series of works "Discovery informosom - a new class of intracellular particles." Listed in the "Golden Book of Honor of the Kazakh SSR" (1974). Gold Medal of the Soviet Peace Fund (1987). Order of Friendship of Peoples (1987).

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Объяснение:

1. I bought potatoes yesterday. -POTATOES WERE BOUGHT BY US YESTERDAY

2. We shall bring the books tomorrow. -THE BOOKS WILL BE BROUGHT BY USTOMORROW

3. They are repairing the clock now. -THE CLOCK IS BEING REPAIRED BY THEM NOW

4. They sell milk in the shop. -MILK IS SOLD BY THEM IN THE SHOP

5. I have translated the whole text. -THE WHOLE TEXT HAS BEEN TRANLSATED

6. When I came home they had eaten the sweets. -THE SWEETS HAD BEEN EATEN BY THEMWHEN I CAME HOME

7. We shall do the work in the evening.-THE WORK WILL BE DONE BY US IN THE EVENING

8. He wrote his book in the 19th century. -THE BOOK WAS WRITTEN BY HIM IN THE 19TH CENTURY

9. They were playing tennis from 3 till 5. -TENNIS WAS BEING PLAYED BY THEM FROM 3 TILL 5

10. He has stolen a lot of money. -A LOT OF MONEY HAS BEEN STOLEN BY HIM

11. By the middle of autumn we had planted all the trees. -ALL THE TREES HAD BEEN PLANTED BY THE MIDDLE OF AUTUMN

12. They are building a new cinema house in our street. - A NEW CINEMA HOUSE IS BEING BUILT BY THEM IN OUR STREET

13. By six o'clock they had finished work. -THE WORK HAD BEEN FINISHED BY THEM BY 6 O'CLOCK

14. We have been looking for you the whole mOrning. -YOU HAVE BEEN BEEN LOOKING BY US THE WHOLE MORNING

15. She showed him the way to the metro station. -THE WAY TO THE METRO STATION WAS SHOWED HIM BY HER

16. We send our daughter to rest in the South every year. -OUR DAUGHTER IS SENT TO REST IN THE SOUTH EVERY YEAR BY US

17. They will show this film on TV. -THIS FILM WILL BE SHOWN ON TV BY THEM

18. They have forgotten the story. -THE STORY HAS BEEN FORGOTTEN BY THEM