4. Complete the sentences with the correct form of the verbs in brackets.
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Ответ:

1. I was doing homework …

2. While I was writing a letter, …

3. The Jurassic period lasted about …

4. There was. I didn’t know who he was; I hand not seen him …

5. He wrote the letter, put it in …

left in on the table , and went out.

6. The house was dirty . They had not cleaned it for weeks

7. He knew that she had been working in …

Объяснение: