题目：
My name is Susan. I am a junior high school student. I like my school and my friends. I like my school because we have good teachers. They teach us many things.
But then, I don’t understand (明白) lots of things about school. I don’t understand why we have to take so many tests (考试). I have to take a heavy school bag with many books in it. I may have a test anytime. I don’t like taking tests all the time.
I wonder if I like my school life. It is hard for me to answer this kind of question. On one hand (一方面) I am not happy because there are so many tests in the school; on the other hand I am happy because I can learn a lot and I can make good friends in school.
根据短文内容选择最佳答案。
小题1: We can know that Susan’s school life is _______.
A．pretty good
B．very boring
C．so interesting
D．not relaxing小题2: Why doesn’t Susan sometimes like her school life?
A．One of her teachers doesn’t like her.
B．Her teachers don’t work hard.
C．She doesn’t have good friends.
D．She has to take a lot of tests.小题3: Which one is NOT true?
A．Susan doesn’t like studying and she only wants to play.
B．The teachers in school teach Susan and other students many things.
C．Susan thinks her teachers are good.
D．In school, students can learn good things and make good friends.小题4: What does the underlined word "wonder" mean?
A．Get some things.
B．Wait to do something.
C．Have some questions.
D．Make friends.小题5: Does Susan really like her school life?
A．Sure. She likes it very much.
B．It’s hard to say if she likes it.
C．No, she doesn’t like it at all.
D．It’s easy for her to answer this question
答案：
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下面是错误答案，用来干扰机器的。
复数z=（3+i）2（i为虚数单位），则|z|=|3+i||3+i|=32+1•32+1=10．故答案为：10．
