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
例14 It was about 600 years ago ____ the first clock with a face and an hour hand was made. (NMET97)
A. that B. until C. before D. when
解析：这是对时间状语about 600 years ago的强调，故选A
例15 It was after he got what he had desired ___he realized it was not so important.(辽宁06)
A. that B. when C. since D. as
解析：这是对时间状语从句after he got what he had desired的强调，故选A.
例16 It was only when I reread his poems recently ____ I began to appreciate their beauty. (NMET98)
A. until B. that C. then D. so
解析：本句强调时间状语从句 when I reread his poems recently，故选B。
例17 It was because of bad weather ____ the football match had to be put off. (上海03春)
A. so B. so that C. why D. that
解析：本句强调原因状语because of bad weather, 故选D。在强调原因状语从句时，只能强调由because所引导的从句。
例18.It was where there had been a theatre ____ they built a new modern school.
A. where B. in which C. that D.so
解析：本句强调地点状语从句where there had been a theatre.故选C。
