: "мусор одного человека сокровище другого человека"

uschestvuet beautiful legend about Valentine's Day.
St. Valentine lived in Rome in the third century AD. While Claudius was emperor of Rome. He was not very popular, because he was trying to get more and more people for his army. Men do not want to go into the army, and Claudius thought it was due to the fact that they did not want to leave their wives and children. "If they do not get married, they will go into the army," he thought, and a law was passed that forbade marriage.
Valentine was a Christian priest, who did not like the new law. He secretly married people who were in love. One night, the soldiers of the Emperor caught him and put him in prison. Valentin was going to die.
Many young people feel sorry for Valentine's Day and visited him in prison. One of them was the daughter of a prison guard. On the day of his execution, Valentine wrote a note to her and signed it "With love from Valentine." It was February 14, the 269 BC ..
Since February 14 - love when people send love letters and gifts to each other. They do not sign their name cards, but write "Guess Who" or "Your Valentine."
First it was the European tradition, but then it became popular in other countries. She came to Russia, too, but many people say, "If you love someone, you have to show it every day, not just one day a year."

Нужно поставить их в правильной форме (Past simple или Past perfect)

16  He (be) an American citizen for 20 years when the war (break out)  17  He (say) he (spend) the last 15 years of his life exploring the world  18  I (not can) buy the record because I (lose) the money  19  I (not go) to the museum with my class because I (be) there before  20  When we (buy) the house, it (be) empty for several years

осто так.

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