根据上下文和首字母提示，补全下列单词。

1. My pens and books are in my b______.

2. I don't have a pencil s______. Do you have one, Tom?

3. Do you have a n______? You can take notes (记笔记) in it.

4. This is my phone number. You can c______ me.

5. What's this i______ English?

《红楼梦》小说中，林黛玉是贾母的外孙女，贾宝玉是贾母的孙子，从科学角度看，他们相爱却不宜结婚，其理由是[ ]

A．林黛玉出身卑微非门当户对   

B．他俩是近亲，后代不符合优生原则  

C．贾宝玉已有妻室，不合婚姻法  

D．自由恋爱有违父母之命