老师进度快，难度高，课下看不懂，作业难完成
没有大量时间补习，没有老师讲解自学难坚持
老师讲解题目能听懂，考试做题没思路
人气教师 互动授课
学生内容 当堂练习
不懂就问 在线答疑
错题复习 追踪复习
学习效果管理
设定学习目标 封闭抗干扰
定期答疑直播 点拨重难点
简单学习网在全国首创“互动封闭拟真课堂”。其独特之处在于：模拟真实课堂，基于智能错题本、课后练习和快速网络答疑，融名师系统讲授和“1对1”个别辅导为一体。旨在帮助全国的中学生“反复... 学校首页
2. whether引导主语从句，意为“是否”，只起连接作用，不充当任何成分。（置于句首时必须用whether引导，置于句尾时，间或可用if。）Whether he will win the game is not clear.Whether he will come is uncertain.Whether she comes or not doesn't concern me.It is not clear whether/if he will come.It was uncertain whether he would come.
3. 连词代词what, who, which, whose等引导的主语从句。这些连接代词作用相当于代词，在从句中担当主语、宾语、表语、定语等。What we need is more time.Who was responsible for the accident is not yet clear.Whose book it is not important.Which school you want to go matters much.
4.连接副词when, where, why, how引导的主语从句。这些连接副词相当于副词，在从句中充当状语。Why he did this is not known.When he will come is still unknown.It is not known why he did this.How he succeeded is unknown to us.Where we should hold the meeting needs to be discussed.
注意：wh-引导的主语从句也常用it作形式主语。
5.也可用whatever,whoever,whomever,whenever,wherever等词引导主语从句，表示“无论什么”、“无论谁”、“无论何时”、“无论在（到）哪里”等。
