题目内容：

高中英语问题（请给出具体的题目解析）
1、_____more energy to my study instead of being crazy about Internet Games,I would be sitting in a comfortable office now.
为什么填“If I devoted”?
2、A student of English______limited exercise finds it hard to get good mark in on English exam.
为什么填“used to dealing with”?
【请给出详细的解析,本人英语语法较差.谢谢!】