43. It is one thing to locate oil, but it is quite another to ________ and transport it to the industrial centers. (A) permeate (B) extract (C) distinguish (D) concentrate

39. During virtual reality operations, the surgeon can have a better view of the cuts in the body because ________. (A) he is looking at the cuts on a computer screen (B) the cuts can be examined from different angles (C) the cuts have been highly magnified (D) he is wearing 3-D glasses