The book was writter in 1946,_____the educationsystem has witnessed great changesA when B during which C since then D since when 选第二个吗,什么时候选第一个啊,第三四个是不是没这种说法啊,您觉得囊

Question

The book was writter in 1946,_____the educationsystem has witnessed great changes
A when B during which C since then D since when 选第二个吗,什么时候选第一个啊,第三四个是不是没这种说法啊,您觉得囊

Answer 1

本题不选A、B
答案是D 这是定语从句,从句中用的是现在完成时时态,所以说用since,而且这种用法常考,请记住～
详细请见下面网址～http://taianguzhiqing.blog.163.com/blog/static/4816600320092195135289/