21.complete the sentences. use the past simple. she ) to clean the kitcen.

She began to clean the kitcen.

1. This is Mary's car. This is her car.

2. This is Paul and Judy's house. This is their house.

3. This is Sasha's pencil box. This is his pencil box.

4. This is Jerry's cat. This is his cat.

5. These are Ann's and Liza's books. These are their books.



Объяснение:

's после имени обозначает, что этому человеку принадлежит что-то. This is Ann's cat. Это кошка Ани. Если один и тот же предмет принадлежит двум лицам, 's пиши после последнего имени:

This is Tom and Mary's house. Если им принадлежат разные ручки, например, то: 's пиши после каждого имени: These are Tom's and Mary's pens.

1 Dr Jones reached the conclusion that the bones weren't 5th century.

2 After performing the analysis, they found that the people had come from Polynesia.

3 The test results were evaluated at the laboratory.

4 The builders who made the discovery were given a reward.

5 Our findings support Professor Rice's theory.

6 After analysing the statistics, Peter decided to publish them.

7 The person who carried out the experiment on the bones was Stephen Doughty.

8 No one has yet officially put forward the theory that the city inhabitants died of starvation.

Объяснение:

reach a conclusion - прийти к выводу

perform the analysis - провести анализ

evaluate results - оценить результаты

make a discovery - обнаружить

support a theory - поддерживать теорию

analyse statistics - анализировать статистические данные

carry out the experiment - провести эксперимент

put forward a theory - предложить/высказать теорию