2015年6月大学英语四级词汇练习题及答案（5）

　　1.Some people believe that since oil is scarce, the ________ of the motor industry is uncertain.

　　A) terminal

　　B) benefit

　　C) fate

　　D) estimate

　　2.To speed up the ________ of letters, the Post Office introduced automatic sorting.

　　A) treatment

　　B) delivery

　　C) transmission

　　D) departure

　　3.These overseas students show great ________ for learning a new language.

　　A) enthusiasm

　　B) authority

　　C) convention

　　D) faith

　　4.The defense lawyer was questioning the old man who was one of the ________ of the murder committed last month.

　　A) observers

　　B) witnesses

　　C) audiences

　　D) viewers

　　5.Politically these nations tend to be ________, with very high birth rates but poor education and very low levels of literacy.

　　A) unstable

　　B) reluctant

　　C) rational

　　D) unsteady