16. The police set a ________ to catch the thieves.

　　A) plan B) device C) trap D) trick

　　17. We have to try every means to ________ the costs of the construction project.

　　A) bring off B) bring forth C) bring down D) bring back

　　18. The students were participating ________ an international energy-saving competition between towns in New England and Canada.

　　A) for B) in C) to D) at

　　19. When she was criticized, she claimed that it was outside her ________ of responsibility.

　　A) field B) limit C) extent D) range

　　20. We welcome rain, but a(an) ________ large amount of rainfall will cause floods.

　　A) extensively B) extremely C) specially D) constantly

　　答案：

　　11-15 BCDDA

　　16-20 CCBDB