将下列句子中的汉语部分译成英语，注意使用适当的形式。
People may work in 100 years. (在太空)
It's very cold outside. You'd better put on your coats to the wind. (不让…….进入)
Be quiet! All the students are reading in the library (沉默地)
Students wear uniforms on school days. (被要求)
The old man selling newspapers. （谋生）
