Всадник быстро мчится на лошади. Что будет со всадником, если лошадь споткнется

1. Suddenly I  remembered that I had forgotten to phone my mother.

2. He did not know who had sent him the letter.
3. My sister told me that she had watced an interesting film.
4. He opened his eyes and saw that the sun had already risen.
5. The patient had died before the doctor examined him.
6. Where had she studied before she came to work to your office?
7. I had finished to translate the article by seven o'clock.
8. He did not notice that he had  forgotten his watch.
9. We did not know that she had phoned late.
10. My niece was happy that she had got such a nice gift.