Which sentence is grammatically correct?

1. The problem will be discussed later.
2. The problem will discuss later.
1. The letter was given to him at once.
2. The letter was give to him at once.
1. The director is interviews at the office.
2. The director is interviewed at the office.
1. She wasn't told the news.
2. She were not told the news.
1. My sister is shown a new film.
2. My sister is show a new film.
1. The house was seen by him.
2. The house was saw by him.