对长期停用的原煤仓、输煤皮带系统（包括煤斗、落煤管和除尘用的通风管）的积煤、积粉应清理干净，皮带上不得有存煤，以防积煤、积粉（）。

A.自燃

B.爆炸

C.污染环境

D.板结

—Can you imagine __________ the Taiwan HEDP (塑化剂) event will affect our life?

—I'm not sure. Many people have begun to have water instead of drinks. [ ]

A. how far

B. how many

C. how often

D. how much