单选题 ______ the help this computer may provide, it should not be seen as a substitute for fundamental thinking and reasoning skills.
A. For all B. Even with C. But for D. In case of

【正确答案】 A

【答案解析】[解析] 短语介词for all用来表示让步“尽管”，如果接句子，用for all that...。but for“若不是”；in case of“万一”。