Choose the closest paraphrased version after each of the following sentences or the italicized part. Blacken the letter corresponding to your choice on the answer sheet.
As the days and nights flow by, I scan government documents for gaps indicating an area of knowledge that is still classified.（ ）
A.正确答案C…I read the documents trying to find something useful
B.…I read the documents carefully to find something updated
C.…I read the documents trying to find information unknown to public
D.…I read the documents quickly to find information in different categories
