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1 . It was feared that food supplies would give out before the besieged (被围攻的) town could ______ (relieve). (所给词的适当形式填空)
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2 . My mission was________ (relieve) Emma, a Canadian specialist in infectious diseases at the end of her posting.(所给词的适当形式填空)
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3 . A man's first duty is to find a way of supporting himself, thus ________ (relieve)other people of the necessity of supporting him. (所给词的适当形式填空)
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