【单选题】Tom tried to justify his absence from the meeting by ________ that he had been ill that day.
【简答题】命题“2与5都是素数。”的真值是___。(1为真,0为假)
【单选题】He tried to justify his absence with lame excuses. The underlined part means_______
【单选题】He tried to justify his neglect of his responsibility _______ his health.