Verified answer

-eat a snake

You have eaten a snake.

We haven't eaten a snake. / We have never eaten a snake.

-swim in a cold lake

We have swum in a cold lake.

They haven't swum in a cold lake. / They have never swum in a cold lake.

-be on TV

My cousin Dan has been on TV.

You haven't been on TV. / You have never been on TV.

-go to another country

They have gone to another country.

Dolly hasn't done to another country.

-write a blog

I have written a blog.

You haven't written a blog.

-speak English outside class

Alex has spoken English outside class.

You haven't spoken English outside class.

-go scuba diving

The Simpsons have gone scuba diving.

The Browns haven't gone scuba diving.