The new principal decided that he’d better first take a secret __36___ before doing something about Class 5A , which was the worst class in Hill Valley High School．He didn’t need to be informed ___37___ the class was , for ___38__were leading the way．

The door was shut from inside．The lock it had was missing , __39__ knocked off , just leaving a ___40___ for the principal．

Though the principal had __41___badly behaved classes before , what appeared through the _42____ was till a shock for him．It was a scene that was ___43__ seen in action films．But he knew what to do．He ___44__ go into the classroom , take hold of the ___45__ boy and punished him．This would be an example to the others．

He took a deep breath and then ___46__ open the classroom door．He had been prepared for the scene that there should be a shock of __47____ , but few treated him as an important ___48__ , and some even paid little attention to his existence．

“ Silence ! ” he shouted at the top of his voice．This time it was really __49____．They stopped what they were doing and stared at him．Quickly he walked up to the __50__ boy in the room , who he __51____had been playing an important part and also had been shouting at the others at the top of his voice．

He seized the boy by the ear and ___52__ him to the front of the class．

“ I’m going to punish you as an example to the rest , ” he said．“ Now go to my office and wait for me．”

Then he turned to the class and ___53__them about how to behave in school．

To __54___ his speech , he said , “ Does anyone have any questions ? ”

One of the students put up her hand．“ Yes , sir．I have．When can you free my __55__ back to continue his class ? ”

If you _____ his wife’s income____ his own，the total of their income _____ 3000 yuan.

_______ your score and see how many points you get.

Learning to play a musical instrument can change your brain, with a US review finding musical training can lead to improved speech and foreign language skills.
Although it was suggested in the past that listening to Mozart’s music or other classical music could make you smarter, there has been little evidence to show that music can boost(使增长) brain power.
But a data-driven review by Northwestern University has pulled reaserch together that links musical training to learning that spills over into (波及) skills including language, speech, memory, attention and even vocal emotion.
Researcher Nina Kraus said the data strongly suggested that the nervous connections made during musical training also prepared the brain for other aspects of human communication.
“ The effect of musical training suggests that, like physical exercise and its effect on body fitness, music is a resource that tones the brain for auditory fitness and thus requires society to re-examine the role of music in shaping individual development, ” the researchers said in their study.
Kraus said learning musical sounds could improve the brain’s ability to adapt and change and also enable the nervous system to provide constructing patterns that are important to learning.
The study, published in Nature Review Neuroscience , looked at the explosion of research in recent years focusing on the effect of musical training on the nervous system which could have impacts for education.
The study found that playing an instrument prepares the brain to choose what is related in a complex process that may involve reading or remembering a score, timing issues and coordination with other musicians.
【小题1】What is the text mainly about ?

What do you think should _____ the shopping list?