将下列句子中汉语部分译成英语，注意使用适当的形式.
1. It’s polite to keep our voice down ______________(在公共场合).
2. Life is like __________________ chocolates, and you will never know what you are going to get. (一盒)
3. _______________ every day is important. (说英语)
4.The teacher ___________________ (对…….严格) teaching students at school.
5. Could you please ___________ (想出) a good way to improve my English?