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
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