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

16-20 CCBDB