高三英语同步课程
《完形填空之词语辨析》麻雪玲
点击试听好老师
老师传授典型题详细办法
教学生举一反三
一题多解、一题巧解
错题本
错题追踪复习
听课中的错题能自动加入错题本
课后可方便复习及导出错题本
网络答疑
课程互动性强
互动问答
数理化英快速答疑
课后练习
经典例题课后练习
老师针对课堂中的经典例题
为学生推送同类型题，掌握解题方法
31. I saw Mr. Smith last Sunday. We had not seen each other ________ I left London.
A. as B. before C. since D. till
32. I’ll be back before you ________.
A. will leave B. will have left C. leave D. would leave
33. The problem won’t be settled until we ________ a chance to discuss it thoroughly.
A. have had B. will have C. will have had D. would have
34. If you ________ this experiment，you will understand the theory better.
A. will be doing B. have done C. will have done D. would do
35. They went on working ________ it was late at night.
A. even if B. as if C. however D. as though
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