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a. The Fraunhofer Society has a history of about ______ year(s) till now. 60 50 seven one
come up made up gone up turned up
appeared carried published contributed
form outcome effect source
understanding value pattern structure
So little had me known Only a little do we know Very little have we known Little shall we know
signed stressed acted played
seized proven caught grasped
unknow interesting different visible
element shape formation power
We know quite a lot Only little we have known
Very little have we known So much we do know
so far；making so far not；to make up to now；made till now not；makes
turned worked led attempted
written called identified seen
changed described designed shaped
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