Question

两个英语问题，英语高手帮帮忙

1、He is a doctor and there are so many books on _____ in his room
答案上是medical,但是on后面不是应该加名词吗？是不是答案错了，是不是应该是medicine?
2、情景对话里的一段
I like to play the drums,but my parents do not allow me to play on school days.
____________?Do they want you to spend more time studying
答案上是Why not，前面否定后面也得用not?用why可不可以？
谢谢大家了！！
那medical在这里是什么词性？medicine字典上也有药学之类的意思啊

Answer 1

1.on 后可以接形容词。
2.牛津英汉词典关于词条“why not？”的完整注释如下：
used to make or agree to a suggestion(提出或赞同建议)为什么不呢，好啊 ：Why not write to her ?为什么不给她写信呢？ “Let's eat out.”“Why not?”“咋们到外边吃去吧。”“好哇。”Why don't we go together? 我们为什么不一起去呢？
《牛津英汉词典》上关于该词没有明确的区分。

Answer 2

Y: Excuse me, is this your book?
X: Thank you so much.
Y: You are welcome. Are you new admits?
X : yes. We just came to register yesterday. My name is Xiao ling. Nice to meet you. This is my best high school friend Lanlan.
Y: My name is Yani. Nice to meet you, too. This is my friend since childhood, Songtao.
S: hi! We both came from xxx.
L: really? I am from that city, too. We are all town fellows aren’t we?. It’s such a small world.
S: absolutely. We both major in computer science. What’s your major?
X: accounting. I don’t really like it. But my parents said this school offers excellent accounting programs and it will be easier for me to get a job later on.
L: My major is education. I want to be a teacher. I think it is cool.

S: I picked my own major because I know what I want. I just like computers a lot. I would like to be a computer programmer in the future.
Y: Well, I don’t know wether I really like it or not. I just follow Songtao where he goes.
X: I feel bad for those students who make it to the top but had to quit school because of financial problems.
S: My parents paid some of my tution and I said to myself that I want to be a somebody. But no matter how much I do, I will never be able to repay my parents for what they have done for me.
L: I think I will find some off campus jobs in summer. I don’t want to be a burden to my family . My parents have been working hard all their lives.
X: Lanlan, you are great.
S: look. The boys are playing basketball now. I will join them. See you !
X: let’s keep in touch, ok?
L: I don’t have a cell phone. Can I send you e-mails?
Y: Sure. Here is my cell phone number. 12345678
And this is my e-mail address. Please write to me.
L: I will.
X: this is mine.:22334455.I am so glad to meet you. Take care!
Y and S: bye!