The reason why prices______, and still are, too high is complex, and no short discussion can satisfactorily explain this problem

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问题 The reason why prices______, and still are, too high is complex, and no short discussion can satisfactorily explain this problem.

选项 A、were
B、will be
C、have been
D、had been

答案A

解析 句意:物价在过去和现在一直都很高的真正原因很复杂,不是两三句就能解释清楚的。根据and still are可知,此处指过去和现在的价格,所以应使用一般过去时。故选A。
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