What is the topic of the passage?

This story is incredible. You will hardly believe in it.

“If I were you, I would learn English”, she said.

Tony: “I’ve just passed my exam”      Jim :“.....................”

I think we should have our house painting because it looks too dirty.

We _______ walk all the way home. We can get a taxi.

The situation is serious. Something must ___________ before it’s too late.

Many rare animals are now in danger of ………

Our cases are heavy, __________ we took a taxi.

An Indian elephant has ____ than an African elephant.

Species that have already lost habitat because of deforestation were given higher priority in the plan because of their greater risk of extinction.

After he _______ in a factory he opened a small business.

The article is going to be wrote by the editor of the newspaper.

In 1989, a ban was given on all international trade in ivory.

You are not allowed to take photographs here.

I am not deaf. You _______ shout.