请帮忙用英文翻译一下几个句子吧，要用到括号里的词哦。。谢谢了O(∩_∩)O~（急）

we always think of this city as one of the most bustling cities in the world.
it is reported that a gold mine has been founded.
every student is eager to study english well.
when are we supposed to arrive there.
if you can not go, let others substitute for your turn.
making a conference in study has something to do with exerting yourself.

We always think of it as one of the busiest cities all over the world.
It is reported that a goldmine has been funded in that area.
Every student is eager to learn English well.
When are we supposed to get there?
If you can't go,ask someone to substitute for you.
making a conference in study has something to do with your hard work.