题目内容
When we describe or talk about new inventions, we use words and ideas ________ to us.
[ ]
A.known
B.being known
C.to be known
D.having been known
答案:A
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题目内容
When we describe or talk about new inventions, we use words and ideas ________ to us.
A.known
B.being known
C.to be known
D.having been known