From the last paragraph, we can learn that Mr. Obama has
A. fulfilled the promise to his gay supporters.
B. ignored his supporters till present.
C. gained presidency by empty promises.
D. permitted gay marriage in Maine.
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核动力厂营运单位必须采取适当的()措施，以预防或阻止非授权进入、闯入、偷窃、地面攻击以及内部或外部对安全有关系统及核材料的破坏。
A. 特别安保
B. 工业保安
C. 实物保护
D. B和C
Canada and Britain are mentioned in paragraph 3 to illustrate that
America spends more money on medical care than Canada and Britain.
B. both Canada and Britain are fairly successful in terms of healthcare.
C. American expenditure on medical care is not so efficient as expected.
D. both Canada and Britain should hike up their expenditures on healthcare.
截至2017年底，各地特色小镇的建筑依然缺乏地方特色。()
David Levy would most probably agree that
A. the idea of a human marrying a robot is totally crazy.
B. deception might result in a human marrying a robot.
C. robots can be created capable of loving just as humans do.
D. it is not impossible for a human to marry a robot.
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