2017年6月大学英语四级词汇选项练习题（55）

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

　　A) excuse

　　B) intention

　　C) option

　　D) approval

　　2.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

　　3.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

　　4.“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

　　5.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