高手帮忙：That was written in 1946, since______the education system has undergone great changes.

来源：百度知道编辑：UC知道时间：2024/06/01 02:38:28

A then B when C there D which 选B.可我不明白为什么不选A呢,
since then 不是加现在完成时吗？比如 I visited China in 1900. since then, china has undergone great changes. 不是很正常吗？给我详细说说吧，我都失望了，那么多人都觉得不屑的问题我咋就不懂呢。

since在这里是自从的意思后跟的句子缺时间状语所以用when
That was written in 1946, since______the education system has undergone great changes.考的是定语从句
I visited China in 1900. since then, china has undergone great changes. 前后两句在语法上没有联系

这个句子是时间状语从句，如果要用 SINCE THEN ,那么两句句子中间需要加 AND，

that cup was broken I think that that that that man wrote was wrong. who was that/who was it That teacher said that that that that that boy used in that sentence was not correct. It was whispered that.... 是什么意思？ was taken aboard that hat! It was imperative that I be as close as possible.请帮忙翻译请帮忙做道选择题.The boy was so hungry that he ate _____food. It is said that that was all that he said. Who was Edward W. Said