At last the poor man had to give up. He found no use begging for more.A. itB. thisC. that

网友回答

(答案→)A. it
B. this
C. that
D. himself
解析：考查it做形式宾语：因为：it is no use doing是“做…没用”，如果是it做find的宾语，后面要用动名词做宾语，就是find it no use doing“发现做…没用。”选A。