Ответы
Ответ:
1. Bricks belong to artificial materials
1) Do bricks belong to artificial materials? - Yes, they do.
2) Do bricks belong to artificial materials or natural ones?
3) What type of materials do bricks belong to?
4) What does belong to artificial materials?
5) Bricks belong to artificial materials, don't they?
2. Their production started in prehistoric times.
1) Did their production start in prehistoric times? - Yes, it did.
2) Did their production start in prehistoric or present time?
3) When did their production start?
4) Which production started in prehistoric times?
5) Their production started in prehistoric times, didn't it?
3. Since the bricks have been produced in many countries.
1) Have the bricks been produced in many countries since? - Yes, they have.
2) Have the bricks been produced in many or few countries since?
3) How many countries have the bricks been produced since?
4) What have been produced in many countries since?
5) Since the bricks have been produced in many countries, haven't they?
Объяснение: