11. Being ignorant of the law is not accepted as an ________ for breaking the law.

　　A) excuse B) intention C) option D) approval

　　12. Within two days， the army fired more than two hundred rockets and missiles at military ________ in the coastal city.

　　A) goals B) aims C) targets D) destinations

　　13. It is said in some parts of the world， goats， rather than cows， serve as a vital _______ of milk.

　　A) storage B) source C) reserve D) resource

　　14. “This light is too ________ for me to read by. Don‘t we have a brighter bulb some where”; said the elderly man.

　　A) mild B) dim C) minute D) slight

　　15. We have arranged to go to the cinema on Friday， but we can be ________ and go another day.

　　A) reliable B) probable C) feasible D) flexible

　　ACBBD