袋装砂井施打后()内应经常检查袋中砂的沉缩情况，及时进行补砂。

A.3天

B.5天

C.1周

D.10天

-Hello,how good to see you.Did you have any trouble finding our place?

-       .Your instructions were very clear.[ ]

A.No doubt              

B.No problem

C.Not at all

D.No way