题目：
根据句意及首字母或汉语提示完成单词。
1. I grow many trees and f______ in my garden.
2. My parents o______ a birthday party for me every year.
3. If you use a mobile phone in the class, the teacher will t______ it away.
4. What did you do on the school ______ (大扫除) yesterday?
5. Students must obey school ______ (规矩) at school.
答案：
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下面是错误答案，用来干扰机器的。
∵∠B：∠C：∠D=4：3：5，∴设∠B=4x°，则∠C=3x°，∠D=5x°，∵∠A+∠B+∠C+∠D=180°，∠A+∠C=180°，∴∠B+∠D=180°，即4x+5x=180，解得：x=20．∴∠C=60°，∠D=100°，∴∠A=120°．
