szpiegowskiej in English:

The spy burned the papers.

He works as a teacher, but actually he is a spy.

He proved to be a spy.

He believes that there is a spy among us.

It occurred to me that he might be an industrial spy.

You aren't a spy, are you?

You only really need to sound exactly like a native speaker if you want to become a spy.

Do you think you have to be able to pass for a native speaker to be an effective spy?

Watch out! A police spy is snooping around.

The investigation revealed him to be a spy.

No sooner had the spy returned home than he was told to go to another country.

The spy sent information by code.

The police detected the spy.

A spy may be about.

Can you spy the cat among the pigeons?