【正确答案】正确答案：In sentence a, the speaker has violated the first Quality maxim, which says "do not say what you believe to be false". In the literal sense, no human being would marry a lioness, and therefore at this level, it is a false statement. However, the deliberate violation of the maxim will lead us to interpret it as a metaphor, meaning that his wife had a bad temper. In sequence b, B has flouted the maxim of Relation, since he did not answer A"s question directly. However, assuming that B was co-operative, A was likely to derive the implicature that since B had a terrible headache, he would probably just lie in bed and do nothing. In exchange c, a violation of the first Quantity maxim was recognized, which says " make your contribution as informative as is required for the current purposes of the exchange". B was supposed to provide the specific information of the place he had been to; however, he didn"t. By such a violation, B probably implied that "I do not want to tell you where I have been".