关键词：考研英语语法填空
在考研英语的备考过程中，语法填空是一个考验考生基础语法知识的重要环节。以下是一篇考研英语语法填空的练习及答案：
【练习】
1. I _______ (be) excited about the upcoming vacation, but now I _______ (change) my mind.
2. The _______ (be) of the meeting was to discuss the new project.
3. By the time he finished his homework, it _______ (be) already dark outside.
4. _______ (be) you ready for the presentation tomorrow?
5. I _______ (have) this book for two years now.
【答案】
1. was; have changed
2. purpose
3. had been
4. Are
5. have had
通过上述练习，考生可以检验自己对英语基础语法的掌握程度。在备考过程中，不断练习和总结是提高语法填空能力的关键。
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