30. For years people thought the picture was a(n) _____ Van Gogh, but in fact it's a fake.
A. absolute B. artificial C. genuine D. sincere
29. Ten companies have already joined the organization and will be meeting on a ______ basis.
A. ordinary B. usual C. frequent D. regular
28. The gate will close ______ two minutes before the train leaves.
A. actually B. approximately C. relatively D. reliably