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

　　答案：CBABA