（ ）been so many people on a diet as today.
A、
More than ever before have there
B、
In the past there have never
C、
Never before there have
D、
Formerly there had never
【正确答案】：B
【题目解析】：
本题考查现在完成时态。
本题中由于没有过去时间点或已知动词，所以不能用过去完成时，不选D，“more than ever before”和“in the past”不用倒装，故排除AC。have never been”从来没有“，选B。
现在完成时态形式为have done, 过去完成时态形式为 had done.
句意：在过去，从来没有像今天这样有这么多的人在节食。