2.Make the sentences negative. 1) Leonardo Da Vinci was a famous composer.
2) Sir Arthur Conan Doyle wrote many stories about plants and animals.
3) Alexander Bell painted the famous Mona Lisa.
4) Michael Lermontov studied the anatomy of the human body.
5) Bill Gates created the early flying machine.
6) Claude Monet explored nature.
7) Isaac Newton founded many historical artefacts in Asia.
8) Michael Cane was a famous architect in the 70's.
9) Roger Moor starred in Gone with the Wind, the famous Hollywood blockbuster.
10) John Lennon invented reggae music in the early 80's.

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Объяснение:

1. When the street had been widened it could be used for bus and tram traffic. Past Perfect Passive Voice, Past Simple Passive Voice. Когда улица была расширена, ее можно было использовать для автобусного и трамвайного движения.

2.This offer will be carefully considered by the commission. Future Simple Passive Voice. Это предложение будет тщательно рассмотрено комиссией.  

3.A new research is being carried out successfully. Present Continuous Passive Voice. Новое исследование проводится успешно.  

4. He is listened to with great pleasure. Present Simple Passive Voice. Его слушают с большим удовольствием.

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Объяснение:

1. When the street had been widened it could be used for bus and tram traffic. Past Perfect Passive Voice, Past Simple Passive Voice. Когда улица была расширена, ее можно было использовать для автобусного и трамвайного движения.

2.This offer will be carefully considered by the commission. Future Simple Passive Voice. Это предложение будет тщательно рассмотрено комиссией.  

3.A new research is being carried out successfully. Present Continuous Passive Voice. Новое исследование проводится успешно.  

4. He is listened to with great pleasure. Present Simple Passive Voice. Его слушают с большим удовольствием.