I can well remember that there was a time a deep blue sky, the song of the birds, moonlig

I can well remember that there was a time a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound.
A. which
B. where
C. when
D. that

A. whichB. where(答案→)C. whenD. that解析：考查固定搭配 题意为 我仍然能够清楚的记得曾经有一段时间，蓝蓝的天空，美妙的小鸟叫声，夜光，花朵使我难忘。There was a time when，曾有一段这样的时光。考点 固定句型。

收益了