Neverbefore_______sorapidlydevelopingasitistoday．
A、hasourcountrybeenA
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。
Thestudentsarerequiredto________themainideasofthearticleintheirownwords.
Iunderstoodfromherthatyouundertookotherimportantwork______.
Theoutlineofrooftopsandchimneys________againstthepalesky.
Itisvitalthatthework_______intime.
Thefarmingmethodshavebeen________improvedwiththeinventionofthenewmachine.
