几个需要改正的英语句子、请具体说明原因!

题目

几个需要改正的英语句子、请具体说明原因!
Those at the desk want to buy tickets write down your names.
Which is known to all,many satellites are going around in the sky.

答案

Those who want to buy tickets write down your names at the desk .
谁要买票这句话是定语从句.
As is known to all ,many satellites are going around in the sky .
查了很久,认为这个比较适合.
如果不一定要求格式,那这样表达更加地道：It is known to all that many satellites are going around in the sky .