单选题 This ten-year-old boy lost his life ______ his classmate in the water.
A. trying to save B. tried to save
C. to try saving D. to try to save

【正确答案】 A
【答案解析】[解析] 要明确空白处与lost his life语义之间的联系，trying to save不表示目的，而是时间。