单选题 Frank had worked for two years to be a carpenter, but found his progress ______.

【正确答案】 D

【答案解析】词性语法题。由于此处的宾语补足语修饰的是表示物质概念的名词progress，故可确定排除所有含有过去分词的选项。答案为D。unsatisfactory“令人不满的”，修饰物。符合要求。句意：福兰克学了两年木匠，但进步甚微。