about the universe up till now.
A. So little had me known
B. Only a little do we know
C. Very little have we known
D. Little shall we know
网友回答
A. So little had me known
B. Only a little do we know
(答案→)C. Very little have we known
D. Little shall we know
解析：否定词在句首句子要部分倒装。