We live day by day but in the great things the time of days and weeks so small that a day

问题补充：

We live day by day，but in the great things the time of days and weeks so small that a day is unimportant.

A. is

B. are

C. has been

D. havebeen

答案：

(答案→)A. is

B. are

C. has been

D. havebeen

解析：决定下划线处谓语动词单、复数形式的主语应是the time，其后面定语“of days and weeks”包含的复数名词对谓语动词的形式不构成影响。