根据所给音标、汉语或首字母提示写出下列句中所缺单词。

Don't forget to____ /nɔk/ at the door before entering the meeting room. 

The new law is so strict that it doesn't____ / ə' lau/ any indoor smoking.

He got____ /drest/ quickly after taking a shower.

People throw l____  into the river and make it really dirty.

Nobody knew what to say and they just sat there in s____ .

The medicine should be taken t____  a day after meals.

When he grew up, he turned into an____ （诚实）and helpful person.

It's said that the terrible weather in this____ （季节）caused the ship accident.

A sweeping robot is____ （确切地）what I want for my house.

The fantastic world surely ____ （属于）to young people and the future.

在一些城市，节日里亲朋好友互送鲜花成为时尚，但鲜花销售市场却是冰火两重天。在同一鲜花店，那些成色好、与节日主题关联度高、包扎漂亮的鲜花非常畅销，而且价格高。反之，那些不够新鲜、与节日主题不甚相关的花，价格一降再降也无人问津。

结合经济生活有关知识分析鲜花销售市场冰火两重天的原因。