除工业炸药及其制品的民用爆炸物品的警示语是（）。

A.防火、防盗

B.小心、轻拿

C.防火、防潮

D.轻拿、轻放

If you _____ careful, you will have an accident. [ ]

A. don't

B. be

C. aren't

D. not be