—It has rained for a day. What timely rain! .A. So it isB. So is itC. So it hasD. So has i

问题补充：

—It has rained for a day. What timely rain!

.

A. So it is

B. So is it

C. So it has

D. So has it

答案：

(答案→)A. So it is

B. So is it

C. So it has

D. So has it

解析：句意：下了一整天的雨。多么及时的雨呀！的确是及时的雨。So + 主语+ 助动词，表示对上句话的肯定。根据语境所以选A。