.我也不知道对不对 I stood up, finding that a person is looking at me.
2. Two hours later, they got very tired.
3. I saw a young man running after a puppy across the fielf just now.
4. He had nothing to do last night, so he went to see a movie.
5. When we were running across that road, we suddenly saw a snake.
6. When I phoned Mr. Black, he was reading a book.
7. When I came into the room, he was thinking about buying a present for me.