Never before _______ so rapidly developing as it is today．
A
此题考查倒装句。否定词位于句首，句子应该部分倒装。句意：我们国家从来没有像今天一样进步如此迅速。
Thevehiclewastravelingatspeeds________90milesperhour.
Thestudentsarerequiredto________themainideasofthearticleintheirownwords.
Sincewehaveafocusedsubject，weshouldnottalk________.
Neverbefore_______sorapidlydevelopingasitistoday．