Question

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

Answer 1

B

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。