What does Howard Dean think of his experience in Iowa

单项选择题In the first test of the election year, ______.

单项选择题It can be inferred from the passage that ______.

单项选择题The author draws the regulated tariff rates to show that the three countries ______.

单项选择题The economic performance of these three countries may improve because ______.

单项选择题It can be learned from the passage that the new customs union ______.