14. I will ____ you for your kindness if you can help me to watch over my dog during my holiday.

A．appreciate

B．appreciative

C．thank

D．grateful

某市公安局治安大队发现陈某有非法买卖、储存危险物质嫌疑，立即对案件展开调查，并从其家中搜出黑火药5千克。经多方调查查明，陈某从某市多种途径购进黑火药，并储存在其家中。本案中，陈某的行为应以非法储存危险物质的违法行为论处。