Закончите разделительные вопросы и перепишите их. 1. Wood is the most ancient structural material, …?
2. We use many building materials for bearing structures, …?
3. He will wait in the next room, …?
4. There isn’t any extinguishing valve in this system, …?
5. We haven’t known him since his childhood, …?

1. Wood is the most ancient structural material, isn't it?

2. We use many building materials for supporting structures, don't we?

3. He will wait in the next room won't he?

4. There isn’t any extinguishing valve in this system  is there?

5. We haven't known him since his childhood, have we?

1. Wood is the most ancient structural material, isn't it?

2. We use many building materials for bearing structures, don't we?

3. He will wait in the next room, won't he?

4. There isn’t any extinguishing valve in this system, is there?

5. We haven’t known him since his childhood, have we?