知道内情
6.Perhaps not many people know how Mr. Pan Shou had contributed to the establishment of Nantah. 
7.Nobody knows how he was murdered, but a good many people behind the scenes can guess why.
8.They appear to be doing this simply to help their friends, but who knows the real reason—there are wheels within wheels.
9.Tina helped mother make some of the Christmas surprises, and she felt important to be in the know.
10.An insider told me that the real reason for Mr Ho to sell the machines is not that the profit is too small.
