题目内容
17.The real reason why prices __________,and still are,too high is complex,and no short discussion can satisfactorily explain this problem.( )| A. | Were | B. | will be | C. | have been | D. | had been |
分析 过去和现在价格一直居高不下的真正原因很复杂,简短的讨论解释这一问题无法让人满意.
解答 答案A.根据句意和题干中的 and still are 提示,可知过去的价格也一直居高不下,故用一般过去时,表示过去的状态,故选A.
点评 用何种时态,可以根据句意以及题目中所给的提示进行判断和选择.
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