English is one of John’s subjects.

I ________ a book on fashion at this moment，and it ________ in the book that Europeans started towear top hats in the early 1800s.[ ]

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。

He is poor _____ he is happy all the time.

I’m afraid of the exam.—_____ It is not difficult at all.