单选题 It took a long time and considerable effort to develop a new software, and ______, many customers were satisfied.
【正确答案】 D
【答案解析】[解析] 单词形态：副词
1．这是一道单词形态选择题，选项均为fortune的不同形式。
2．同位连词后出现空格，若连词后的句子完整，则应填入一个副词。因此D为正确选项。