先说第一题,concerns were raised 这可以看成一个完整的句子,所以后面的从句意思只能是说,哪种情况下concerns were raised,when就可以用来 引导时间状从 了,意思是说当证人被鼓动夸大事实时concerns were raised,如果用which,那这里的which在从句中作什么成分呢?!就讲不通了which后面接名词,意思是说,修饰前面的定语 引导名词性从句 时,后面的是名词,而该题是状语从句,所以不能用which你可以感觉一下这个句子,do you like the girl which (girl)i met yesterday? 其实是which后面省略了名词girl,你喜欢那个女孩儿么,哪个女孩...