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【题目】(2015.江苏)The real reason why prices ____ , and still are, too high is complex, and no short discussion can satisfactorily explain this problem.
A.were
B.willbe
C.havebeen
D.hadbeen

【答案】A
【解析】句意:过去和现在价格一直居高不下的真正原因很复杂,简短的讨论解释定问题无法让人满意,根据题干中”and still are“的提示可知过去价格也居高不下,故用一般过去进,表示过去的状态。故选A项。

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