Choose the best answer to complete the sentence.
1. She is talking about the author _________ book is one of the best-sellers this year.
2. The man _________ next to me kept talking during the film, _________ really annoyed me.
3. The old building _________ is in front of my house fell down.
4. Was Neil Armstrong the first person _________ set foot on the moon?
5. The children_________ parents are famous teachers, are taught well.
