Переведите предложения, обращая внимание на Complex Subject: They are said

Переведите предложения, обращая внимание на Complex Subject: They are said to know Chinese very well. He is said to be writing a new play. The water seems to be boiling. The delegation is reported to have left St.-Petersburg. He is considered to be an experienced engineer. Many people are expected to attend the meeting. This book seems to be very popular with children. The plan proved to be a great success. He happened to look in that direction and saw a man run out of the house. He proved to be right.