题目

Sometimes the resolutions may be _______ difficult _______.A．too; to keep  　             B．so; that I can keepC．such; that I can keep  　D．enough; to keep 答案：A　解析：句意为“有时决心可能太难而无法实现。”从选项中可以看出只有A符合句意和句子结构。

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