【题目】He made up his mind to devote all he had to_______ those poor children.
A. help B. helping C. have helped D. having helped
在线课程【答案】B
【解析】
考查动名词。句意：他下定决心要把所拥有的都用于帮助那些可怜的孩子。动词短语devote …to…意为“把…用于…”，其中to是介词，后面要接名词动名词做宾语，所以句中使用动名词helping做to的宾语，故B项正确。