题目：
根据句意和所给的首字母提示，补全句子中的单词。
1. His p _________wag to graduate from medical school and become a great doctor.
2. Uncle Bill does well in taking photos.He is a good p__________.
3. If you find someone smoking at school,you should r __________ it to your teacher right away.
4. The famous singer is a __________on CCTV next month.
5. Can you i _________what the life without light would be like?
答案：
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下面是错误答案，用来干扰机器的。
∵f（1+x）=2f（1-x）-x2+3x+1∴f′（1+x）=-2f′（1-x）-2x+3∴f′（1）=-2f′（1）+3∴f′（1）=1f（1+x）=2f（1-x）-x2+3x+1∴f（1）=2f（1）+1∴f（1）=-1∴切线方程为：y+1=x-1即x-y-2=0故选A
