anywhere 和 everywhere 区别

anywhere 和 everywhere 区别
He has been working very hard.______ he worked,he tried his best.
A.Everywhere B.Nowhere C.Anywhere D.Somewhere
A和C,即everywhere每个地方 和anywhere任何他工作过的地方,他都尽力而为.从语意上,好象都说的通,但为什么答案一定是A呢?

anywhere 表示是任何一个地方
everywhere 表示每一个地方
Everywhere he worked,he tried his best.是他曾经工作的每一个地方他都尽力工作.
而Anywhere只能做宾语从句不能做主语!
如果说成He tried his best anywhere that he worked!
就可以!