单项选择题
What dreadful idea occurred to the writer（）
A．The receipt had been stolen by someone. B．someone had taken away the case. C．He could not claim his case without the receipt. D．He had left his receipt at hom
单项选择题 The author regards George Mason’s personal contribution to American law as （）
单项选择题 Mason’s relation to the Federal Bill of Rights was one of （）
单项选择题 Dawson’s example shows that a business starts （）
