—It's OK. I ________ to the shop anyway.
A:was going
B:will have gone
C:have gone
D:will be going
①可用于氯气的收集
②可用于除去氯气中少量的氯化氢气体
③可证明氯气具有漂白性
④可用于实验室氯气的尾气吸收.