题目内容：
His mind had already cracked with thirst .A. He had already lost control of himself because of thirst.
B. He had to make good use of his mind because of thirst
C. He was so thirty that he tried to make full use of his mind.
D. He was so thirty that he could not manage to think of anything.
参考答案：【答案仅供学习，请勿对照自行用药等】