单选题 In fact he had done ______ he could to help the poor.
【正确答案】 A
【答案解析】[解析] 本题测试宾语从句的用法。what引导宾语从句, what在从句中做宾语。本句的意思是;“事实上,他在尽一切所能帮助穷人。”