介词+which做连接词的从句
There are certain things which used to shame me, but of which I am no longer ashamed now.(P183)
At first Su Tungpo acknowledged responsibility only for those poems he had written when he was visiting the villages near Hangchow, those in which he complained of the farmers eating without salt and the abuse of the farmer’s loans, and certain others mentioned in the impeachment.
Once the human mind reaches that purified stage, sense perceptions fall away, because there is nothing to which these thoughts can attach themselves.(P262)
The question of salvation is, after all, only the achievement of spiritual harmony in which the baser instincts of man can be brought under control of his higher nature.(P263)
There are two interesting letters that he wrote to friends to whom he revealed his innermost convictions.(P263)
上次问过这个句式，eric你说介词是和后面的动词搭配的，英语惯用法把它提前。我发现这种从句我可以大概读懂，但是尝试自己写一个句子出来时却觉得很困难。这种句子有规律可循吗？
查字典遇到的问题
testimony：【N-UNCOUNT】 If you say that one thing is testimony to another, you mean that it shows clearly that the second thing has a particular quality. 明证 [also 'a' N, usu N 'to' n]
斜线加粗部分是什么意思呢？
我个人本着“从阅读中发现规律”的原则，发现testimony这个词前面很少跟a（作为n.有跟the的情况也有什么都不跟的情况，详细见本周复盘笔记）但是发现查字典时有提到跟a相关的知识，因此想确认一下~
