The book was writter in 1946,_____the educationsystem has wi

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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

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/

The book was writter in 1946,_____the educationsystem has wi The book was written in 1946,_____the education system has w The book was written in 1946,the education system has witnes the book was written in 1946,-----the education system has s The book was written in 1946,( )the education system has wit The book was written in 1946,__the education system has witn The book was written in 2001,___the education system has wit This is the writer,_____the book was written three years ago In how mang can 10001 be writter as the sum of two primes? 6.Opening the book,she found in it a white,plain envelope wi The book is so interesting.I'm sure she ____(fall)in love wi It was in the year of 2008 _____the great Chinese people hel