The word now should be allowed at the end (feb19)
The English answer provided by Duolingo is not natural in English
I must disagree. "When you knew him, he was working at the post office. He now works at the Prime Minister's office." Sounds natural to me.
He is working now... or He works now
Yes. ,"Now" is to be at the end. This is Massa Bob English...
The english answer doesnt contain the word office (משרד)