单选题 The Constitution’s vague nature has given it the flexibility to be adapted when circumstances change
【正确答案】 A
【答案解析】 vague:模糊的;imprecise:不确切的,不明确的。这两个词意思相近。 apparent:清楚的。It is apparent that we have made a mistake.显然,我们犯了个错误。clear是“清楚的”, easy是“容易的”。