The most energetic and important festivals are that look forward to the end of winter and to the ing of spring.l
A. ones
B. those
C. that
DIt
网友回答
A. ones
(答案→)B. those
C. that
D. It
解析：句意：最富有生气和最重要的节日是期待冬天的结束和春天的到来。句中festivals为复数形式，同时根据句意所以用those来指代，其后的that为定语从句，故选B