这是英语学习小组内部的在线考试作业系统，主要用于在线考试巩固学习
效果和每次学习后布置作业。
This is an online exam and homework system for our English learning group. It utilize online exams to consolidate learning effects and assign homework after each study.
注意事项：
1. 答案区分大小写，不符合会被判定会错误。 2. 有一些试题会设置时间限制，超时自动提交。3. 做完提交后会有正确答案用于自行核对。4. 难题会有讲解，帮助大家彻底弄懂。5. 设置了答题成绩排行榜，鼓励大家你追我赶。
Notes:
1. Be case sensitive. If the case does not match, it will be judged as an error. 2. Some exams will have time limit and will be automatically submitted if timeout. 3. After submitting, there will be correct answers for self-checking. 4. For difficult subjects, I will give tips helping you better understand them. 5. There will be a score ranking to encourage everyone to strive for honor.