He is a kind of person who lacks diligence . Rose is lacking in responsibility. He failed again for lack of cooperation. 1) lack sth 2) n. lack of A coward(懦夫) _________ courage. For ____________ experience, he was beaten in the game. _________ experience, he was beaten in the game. Because he __________________ experience, he was beaten in the game. Though ____ money, his parents managed to send him to university. A. lacked B. lacking of C. lacking D. lacked of