相关Americanpeopleha的文学知识

问题详情：完形填空。阅读下面短文，掌握其大意，然后从各小题所给的四个选项中选出最佳选项。Americanpeoplehavethehabitofsaying“Thankyou”whensomethingkindisdoneforthemorsomethingpoliteissaidtothem,nomatterhowe...