From Legal Today, a girl of four fell from an 8-story-building dead while she___at her house.

Please put all the magazines _______ on the shelf after you finish reading them

If _______, these injuries can develop into more serious problems.

This is ______ English book, and ______ book is very good.

填入下面一段文字横线处的语句，最恰当的一句是（ ）辣，我们都不陌生，很多人无辣不欢甚至吃辣上瘾，这是因为辣椒素等辣味物质刺激舌头、口腔的神经末梢时，会在大脑中形成类似灼烧的感觉，机体就反射性地出现心跳加速、唾液及汗液分泌增多等现象， ，内啡肽又促进多巴胺的分泌，多巴胺能在短时间内令人高度兴奋，带来“辣椒素快感”，慢慢地我们吃辣就上瘾了。