The book was written in 1946, ____ the education system has

时间:2022-07-12 16:25来源:未知作者:admin 点击: 次

24. The book was written in 1946, ____ the education system has witnessed great changes. A. when B. during which C. snce then D. since when

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

A. when

B. during which

C. snce then

D. since when

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