____ is none of your business.　　

Some people create jobs, foster excitement and basically make the system work. They see possibilities ________ others see only problems.

I often think of the days ______ I took part in the military training with the soldiers, _____ has a great effect on my studies.

I'm sorry you've been waiting so long, but it'll still be some time _______ Sundance gets back.

When asked how he liked his job, he said he was happy _____ he was．