单选题 Before an explanation was offered, Mr. Armstrong had ______ believed that he was dismissed from his post due to the project"s failure.

【正确答案】 C

【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wrong的不同形式。
2．空格内应填入一个副词修饰前面的动词。wrong和wrongly均意为“错误地”，wrong出现在动词或宾语后，而wrongly则出现在that从句或过去分词前。因此C为正确选项。