61. A事实判断题。根据第一段内容可以得到答案。
62. B 词义猜测题。从前文 strengthen relationships 和后面宾语 our trade and our
commerce 可知, enhance 意为“提高、加强”。
63. C 推理判断题。从文中的第三段 I know you'll be visiting Iowa, which you visited many
years ago when you were governor.这一句可推断出答案。
64. B细节题。从文章第二段第二句可知答案。
