单项选择题
A.have no difference from place to place in the U. S. B.are over 15% in the U. S. C.have been put an end in the U. S. D.vary from place to place in the U. S.
A.$4.5 B.$4 C.$5 D.$5.5
A.shopping and tipping B.sales and shopping C.sales taxes and tipping D.sales taxes and people