5. Because the weather was cold, we stayed at home
->Because of
6. The teacher is sick, so we have no class tomorrow
->Because
->Because of
7. That restaurant is so dirty that nobody wants to eat there.
->Because
->Because of
8. Because she behaves well, everybody loves her
->Because of
9. He couldn't come because of his serious illness
->Because
5. Because the weather was cold, we stayed at home
->Because of the cold weather, we stayed at home
6. The teacher is sick, so we have no class tomorrow
->Because the teacher is sick, we have no class tomorrow
->Because of the teacher's sickness, we have no class tomorrow
7. That restaurant is so dirty that nobody wants to eat there.
->Because that restaurant is so dirty, nobody wants to eat there.
->Because of the restaurant's dirt, nobody wants to eat there
8. Because she behaves well, everybody loves her
->Because of her good behaviour, everybody loves her
9. He couldn't come because of his serious illness
->Because he was seriously ill, he couldn't come
5. Because the weather was cold, we stayed at home
->Because of the cold weather, we stayed at home.
6. The teacher is sick, so we have no class tomorrow
->Because the teacher is sick, we have no class tomorrow.
->Because of the sick teacher, we have no class tomorrow.
7. That restaurant is so dirty that nobody wants to eat there.
->Because that restaurant is so dirty, nobody wants to eat there.
->Because of that dirty restaurant, nobody wants to eat there.
8. Because she behaves well, everybody loves her
->Because of her good behavior, everybody loves her.
9. He couldn't come because of his serious illness
->Because he was seriouly ill, he couldn't come.