— What are you going to do this afternoon?

— I'll probably go for a walk later on________it stays fine. [ ]

A. as far as  

B. so long as

C. even if  

D. as though

（），背药工要把本班剩余的炸药、雷管和放炮作业后未爆的炸药雷管全部收集并跟别装箱加锁，同时做好管药消耗记录，按运送作业有关标准要求，将药箱送到井下火药库，并同火药管理人员清理退药、加锁，办好清退管药手续，拿上钥匙准备下井。

A.下班后

B.下班前

C.上班中

D.随时