The prosperity of a nation depends largely on
问答题Never once （）(老两口互相争吵) since they were married 40 years ago.
单项选择题what is the author’’s advice to Americans ？（）
A．They treat the dollar with a little respect B．They try to win in the weak-dollar gamble C．They vacation at home rather than abroad D．They treasure their marriages all the more.
