第1个回答 2011-06-09
He failed many times, but he didn't lose confidence.
or
He failed many times, but he always keep confident.
第2个回答 2011-06-09
He failed many times but did not lose self-confidence
第3个回答 2011-06-09
He failed many times, he did not lose confidence
第4个回答 2011-06-09
He failed many times, but he didn't lose heart.