问题补充：
This computer is old, but it is to me because it was a present from my dearest grandpa.
A. great important
B. of little importance
C. of very important
D. of great importance
答案：
A. great important
B. of little importance
C. of very important
(答案→)D. of great importance
解析：英语中 of+名词 就等于这种名词的 形容词 形式, of great importance 中的 great 是用来修饰 importance 的，强调重要的程度，而词组的主体是 of importance . little意思是很小,否定意思.从句子意思来看,应是很重要.所以选D.
