и еще вот это пожалуйста!!!!! Заранее спасибо

Раскройте скобки, употребив глагол в Past Simple и Past Perfect.

1. He already (go) by the time I (come) to the party. 2. Mother (cook) dinner before he (come). 3. When I (reach) the front door, I realized that I (loose) the key. 4. The shop (close) by the time I (get) there. 5. The scientists (carry) out many experiments before they (achieve) satisfactory results. 6. When I (arrive), he (stay) in the same hotel where we first (meet). 7. By the end of the year he (finish) research. 8. He told me that he (not see) much of her since she (move) to another town. 9. When I (come), he already (come) and (sit) near the fireplace looking through a magazine. 10. She said that they (meet) in 1990 for the first time.

1. He had already gone by the time I came  to the party.

2. Mother had cooked  dinner before he came .

3. When I reached  the front door, I realized that I had lost the key.

4. The shop had closed  by the time Igot  there.

5. The scientists carried out many experiments before they had achieved  satisfactory results.

6. When I arrived , he had stayed  in the same hotel where we firstmet.

7. By the end of the year he had finished  research.

8. He told me that he did not see much of her since she had moved  to another town.

9. When I  came, he had already  come  and had sat near the fireplace looking through a magazine.

10. She said that they had met  in 1990 for the first time.