The girl ________ you spoke is my sister.
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1949 was the yearthe P.R.C. was founded.
This is all ____ I know about the matter.
The man ______ leg was broken in a match is a football player.
在含有n(n>0)个元素的线性表中，有________个元素没有前驱。
A. 0
B. 1
C. n-1
D. n
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