25. Stream: a small river
26. Village: a small city
27. Valuable: something that has a high price
28. Attempt: to try
29. Pipe: a long tube that transports water and oil
30. Refinery: a factory to purify oil
31. Appear: show up
32. Oil well: a place where oil comes out from a pipe
33. Risky: dangerous
34. Refine: to make clean; purify
35. Kerosene: oil used in lamps
36. Gasoline: oil used in cars
37. Giant: very large, HUGE
38. drilling: digging underground using a machine
