I. Match the words and expressions on the left with the explanations on the right:( 5 %)

　　( ) 1. reciprocal 　( ) 2. standards of living( ) 3. momentum ( ) 4. common counter ( ) 5. amendment

　　A. privately or publicly owned companies committed to performing a movement service of the same quality for all shippers on an equal basis and without discrimination

　　B. force or speed of movement or development

　　C. changes made to something

　　D. trade in services

　　E. given or felt by each toward the other

　　F. a plan or scheme offered or suggested

　　G. quality of living