求用状语从句来翻译下边的句子。 1.当我进屋时，他正在写信。 2. 我正在街上走着，这时忽然有人从

1. When I entered the room, he is writing a letter.
2. I was walking down the street when suddenly someone patted me on the shoulder from behind.
3. After the match began, he had arrived.
4. We wait until he comes back.
5. She didn't stop working until 11 o 'clock.
6. Once some animals are just extinctive, stronger species will replace them.
7. If one is addicted to the computer too much, he will certainly lack emotional communication with family and friends.
8. As long as everyone is fully aware of the importance of environmental protection, and take effective measures, the problem of pollution must be able to be solved.