问题
选择题
People pass their knowledge _____ from one generation ______ another. [ ]
A. down;to
B. on;to
C. down;in
D. on;in
答案
答案：A
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People pass their knowledge _____ from one generation ______ another. [ ]
A. down;to
B. on;to
C. down;in
D. on;in
答案：A