Paraphrase the following sentences using the Complex Subject: 1. It happened that they were at home that very day. 2. It proved that there were some broken cups in the case. 3. It seems that the play has made a deep impression on him. 4. It appears that the house was built in the 18 th century. 5. It is known that he has a large collection of pictures. 6. It is likely that he has accepted their offer. 7. It is certain that they will be here on Monday. 8. It seemed unlikely that the price of these raw materials would rise. 9. It can’t be expected that he will change soon.