Написать правильную форму глагола в скобках we (not to swim) in the river last summer

Last summer - показатель времени Past Simple.
Отрицание происходит с вс глагола did.
Итог: We didn't swim in the river last summer.
К swim окончание не прибавляется, потому что в предложении уже используем did)

We don't swim in the river last summer

1) — The hill is so high!

- It's the highest  hill I have ever climbed.

2) — The cake is so tasty!

— It's the tastiest cake I have ever made.

3) — She is such a talented actress!

— She's the most talented actress I have ever met.

4) — This text is so difficult!

— It's the most difficult text I have ever read.

5) – Jack’s pronunciation is so beautiful!

- Jack’s pronunciation is the most beautiful I have ever heard.

6) – The dance concert is so interesting!

- It’s the most interesting dance concert I have ever taken part in.

Everybody who loves reading has its own favourite genre of book. Somebody can like detective stories, or drama, or books about tavelling. As for me, I prefer love stories. There are lots of reasons for it. I think that love stories are reflection of our own expectations from life. When I am sad, I read love stories with happy endings to imagine a story about people feeling true amouressness. It makes me feel the same about me and the person I love. These stories teach us that love is the most powerful feeling in the world. I think more people should read those books to provoke deep feelings in their hearts.