Never before in China __________ so carefully concerned about the food safety.A．
题型：不详难度：来源：
Never before in China __________ so carefully concerned about the food safety.| A．people have been | B．have people been | C．are people | D．people are |
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答案
| B |
解析
| 考查倒装。Never，表否定意义，表否定意义的词放在句首时，句子要用部分倒装，排除A,D;根据时间状语before，可知不能用一般现在时态，排除D。所以选B。 |
举一反三
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Under no circumstances to the teacher. | A．is this the first time he has lied | B．this is the first time he has lied | | C．is this the first time has he lied | D．this is the first time he is lying |
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Only when _______ home_____ that he had left his bag in the taxi he had taken.| A．he returned; did he realize | B．did he return; did he realize | | C．he returned; he realized | D．did he return; he realized |
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