challenge accepted
overcome challenges
challenge yourself
meet the challenge
challenge cup
a challenge to a duel.
a challenge to a theory.
challenge sb. to a duel
a challenge to the government's authority.
It is possible to challenge the report's assumptions.
an Asian challenge to occidental dominance.
the challenge was to avoid institutional sclerosis.
a formidable challenge; a formidable opponent.
a challenge to the legality of the banning order.
a challenge to the ethos of the 1960s.
an ethically challenged politician.
Brace yourself for a new challenge!
challenged me to a game of chess.
events that challenge our attention.
a problem that challenges the imagination.
The job doesn't really challenge him.
He had met the challenge and triumphed.
I challenged the truth of their story.
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