4．The book was written in 1946. the education system has witnessed great changes. A．when B．during which C．since then D．since when 解析:句意:這本書寫于1946年.從那時起教育體制發(fā)生了巨大變化.因為從句中時態(tài)為現(xiàn)在完成時.故選since when來引導這一定語從句.A.B兩項引導的從句應使用過去某種時態(tài),C項只是充當后面從句中的時間狀語.而不能充當引導詞來引導該從句.故排除. 答案:D 【查看更多】

 

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The book was written in 1946， 　　　　 the education system has witnessed great changes.

A. when              B. during which       C. since then   D. since when

 

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The book was written in 1946，　　　　 the education system has witnessed great changes.?

A.when　　　　　　　 B.during which?　　 C.since then　　 D.since when

 

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(  )24. The book was written in 1946， 　　　　 the education system has witnessed great changes.

A. when              B. during which       C. since then   D. since when

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