I’m 14, a year younger than most of my classmates.
A week ago one of my classmates, Nitin, asked me for help with math homework. We ended up talking about computers and file-sharing（共享文件）. As we talked I found that he was more experienced and could teach me about file-sharing and networking. We went to his room and watched a movie about robots that he’d downloaded. The math homework was forgotten.
The next day he came again for homework help “What do you do on weekends?” he asked. The truth is, when I have work to do, I do it. I have no special time to kill with friends. I was embarrassed about this. I expected him to think I was boring and said, “Get a life!” He said, “OK. You’re having trouble getting along with people I can show you. I’m old than you.”
Later, he checked my computer. He even connected me to an Internet chess server（服务器）.He was becoming like a big brother.
But when I thought about it, I didn’t really want Nitin’s help” His big-brother idea began to bore me.
“I’ll get you some cool computer programs（程序）”.
“I’ll teach you how to talk to girls.”
He meant what he was saying, but I don’t know why it didn’t make me feel good. Since then he’s hardly talked to me; we seem to have forgotten each other. I don’t think he can “teach” me much, and I don’t think much of him. But I could be wrong·
小题1:What did Mitin help me do?
A．He helped me with my homework.
B．He helped me with math problems.
C．He taught me about file-sharing and networking.
D．He introduced some fiends to me.小题2:What does the underlined word “kill” in Paragraph 3 mean?
A．杀死
B．浪费
C．消磨（时间）
D．打猎小题3:Which is NOT the reason why the writer doesn’t want Nitin’s help?
A．He has no special time to kill with friends.
B．He forgot his homework because of playing with him.
C．He thinks his ideas are not useful to him.
D．He has another big brother.小题4:Can you use a word to describe the writer?
A．Unfriendly.
B．Boring.
C．Independent.（独立的）
D．Lazy.小题5:Choose a title for this passage.
A．I Don’t Want a Big Brother!
B．No Time to Kill
C．My Big Brother
D．My Life After School
如下所示，若将其下三角元素（即行下标不小于列下标的所有元素）按列压缩存储在数组M［0..m］中，即A［0，0］存储在M［0］、A［1，0］存储在M［1］、A［2，0］存储在M［2］，…，A［8，8］存储在M［44］，则元素A［5，5］存储在__（1）__。若将其下三角元素按行压缩存储在数组M［0..m］中，即A［0，0］存储在M［0］、A［1，0］存储在M［1］、A［1，1］存储在M［2］，…，A［8，8］存储在M［44］，则元素A［5，5］存储在__（2）__。