Translation:The poor man did not know what was happening.
It hadn't been added yet, but it is there now. I've been informed that changes made can take up to a week to be recognized by the system. If there is a problem after APRIL 10th 2018, please report it! Thanks. https://www.duolingo.com/comment/26750687
If you encounter future sentences with missing translations, please report them rather than leaving a comment in the sentence discussions. They are more likely to be seen in the reports than here.
The problem is, I post when I am unsure whether my answers are indeed wrong. I did not know for a fact, in this instance and many others, that DL had overlooked an acceptable translation. It certainly seemed likely, but I wasn't sure.
My post sought corroboration from others that I might indeed have answered the question correctly. If I report translations that I feel DL might have overlooked but don't simultaneously post to the forum, I will probably never learn whether an allegation of DL oversight is actually legitimate.
Les pronoms relatifs ce qui, ce que, ce dont sans antécédents.
They refer to ideas that "have not been expressed (before) or that are expressed later in the sentence (after)."
ce qui / ce que (what / that / which ) ce dont (same but) = object of a verb requiring the preposition de ...
Je ne sais pas ce dont il a besoin (avoir besoin de) I do not know what he needs.
* This form can also introduce a subordinate clause in indirect speech... (interrogative sentence from quote) Il se demande: "Qu'est-ce qui fait ce tapage?" --- Il se demande ce qui fait ce tapage. Elle demande: "Qu'est-ce que c'est?" --- Elle demande ce que c'est.
"Se passer" to mean "is happening/is taking place" is a fixed reflexive expression. Here, it doesn't mean what happened to the man himself.
Here are some more examples: Qu'est-ce qui s'est passé ? → What happened?
Comment se sont passées tes vacances ? → How did your vacation go?
Pauvre is an adjective whose meaning changes depending on whether it comes before the noun or after the noun.
Before the noun, the meaning is figurative. un pauvre homme = an unfortunate man
After the noun, the meaning is literal. Un homme pauvre = a poor man (not rich)
There are a number of adjectives like this: cher, ancien, propre, etc., and they all follow the same rule of thumb (before is figurative, after is literal). Here is a useful link.
In which cases should imparfait be translated into English as: a) the simple past; b) past progressive; c) with the help of "would" or "used to", even though the past progressive itself indicates that the action was going on at a certain time in the past or that actions taking place at the same time or that the action in the pastt is interrupted by another action?