He was mortified beyond expression by the idea that he had been duped.

It behooves me all the more to see to it that I am not duped in the end.

And are you, my dear friend, to be duped by this hackneyed word?

Fooled, duped, and laughed at after twenty years of hard service!

But more commonly there is calculation on both sides and both are duped.

But, duped by his successes, he had allowed pride to persuade him that he was really a writer.

This miserable individual, then, was the man for whose sake she had duped him.

Baron Elias himself has seen it, and declares that we have been duped or—worse.

The game was in my hands, and all I had to do was to take care not to be duped.

You needn't exert your voice, for I am not going to be duped.