The May Day Holiday____over,we must now get down to work.A)be B)being C)to have been D)to be

The May Day Holiday____over,we must now get down to work.
A)be B)being C)to have been D)to be

C

B. 前后无连词，用分词，独立主格结构

C

B，2楼说的对，还有就是不懂就用排除法，立即排除AC，因为五一over了，所以将D都排除掉

2楼对