2014年6月英语四级阅读答案之选词填空(石油)
36.C declining
37.E difficult
38.D derived
39.L refine
40.J growth
41.M reserves
42.I feasible
43.G economically
44.k option
45.O steps
36.C declining
37.E difficult
38.D derived
39.L refine
40.J growth
41.M reserves
42.I feasible
43.G economically
44.k option
45.O steps