2013高考英语总复习语法专练知能闯关（04）（答案）（北师大版）
Ⅰ.单项填空
1．(2011•济南5月份练习)I have been working with Lily for years，and never before ________ her so serious!
A．I found B．I have found
C．did I find D．have I found
解析：选D。考查倒装句。否定副词never放于句首时，句子要用部分倒装，所以排除A、B两项。根据语境可知，这之前“我”从没有发现她
