The Active voice or the Passive voice?
1. a) Cristopher Columbus (discover) America in 1492. b) Nobody knows when this fact (discover). 2) a) The Post Office Tower in London (build) in 1964. b) Who (build) the Tretyakov Gallery in Moscow? a) The small island (not, show) on the map.b) Mrs. Pitkin (not, show) me her garden when I came vis her. a) Jonathan Swift (write) "Gulliver's Travels" in the 18th century. b) "Battle of the books" (write) by 1 too. Translate into English.

1. Письмо написали вчера. 2. Ключи потеряли в библиотеке (library). 3. Окна не помыли на прошлой неделе. 4. Домашняя работа не была сделана вчера. 5. Его день рождения праздновали на прошлой неделе. 6. Ёлку нарядили 20 декабря.
помогите пжж
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a) Christopher Columbus discovered America in 1492. (Active voice) b) Nobody knows when this fact was discovered. (Passive voice)
a) The Post Office Tower in London was built in 1964. (Passive voice) b) Who built the Tretyakov Gallery in Moscow? (Active voice)
a) The small island is not shown on the map. (Passive voice) b) Mrs. Pitkin did not show me her garden when I came to visit her. (Active voice)
a) Jonathan Swift wrote "Gulliver's Travels" in the 18th century. (Active voice) b) "The Battle of the Books" was written by him too. (Passive voice)
Translation:

The letter was written yesterday. (Passive voice)
The keys were lost in the library. (Passive voice)
The windows were not cleaned last week. (Passive voice)
The homework was not done yesterday. (Passive voice)
His birthday was celebrated last week. (Passive voice)
The Christmas tree was decorated on December 20th. (Passive voice)