Work in pairs and what you can do together. use let's

Работайте в парах что вы можете сделать вместе
Наверное так

The Hermitage is one of the world's largest museums. It is located in Saint Petersburg. It consists of 5 buildings. The museum's collection houses about 3 million different works of art.From the very beginning the Hermitage was Catherine's II private collection of paintings, but in the time of Nicholas I the Hermitage opened for general public. This happened in 1852.

Эрмитаж является одним из крупнейших музеев мира. Он расположен в Санкт-Петербурге. Он состоит из 5 зданий. Коллекция музея насчитывает около 3 млн. произведений искусства.
С самого начала Эрмитажа Частная коллекция Екатерины II в живописи, но во времена Николая I Эрмитаж был открыт для широкой публики. Это произошло в 1852 году

1. I play the piano very well. I don't play the piano very well.
2. Jack plays the piano very well. Jack doesn't play the piano very well.
3. You know the answer. You don't know the answer.
4. She works very hard. She doesn't work very hard.
5. They do the same thing every day. They do not do the same thing every day. (Не уверена в правильности отрицательного предложения)
6. I understand.
7. He doesn't smoke.
8. They know.
9. She loves him.
10. They speak English.
11. I don't want it.
12. She doesn't want them.