Fill in the blank with the most appropriate preposition: We can make…

The correct answer is Option (4) → under

Complete sentence: We can make no progress if we continue working under these conditions. The work goes on in poor conditions, so “working under these conditions” is correct.

Option	Used to show	Example
(1) with	company or an instrument. “Working with these conditions” would mean using the conditions as tools, which is not the sense here.	She cut the paper with scissors.
(2) for	purpose or benefit. Nobody works for the sake of bad conditions.	He works hard for his family.
(3) from	a starting point or source. “Working from these conditions” does not express being in them.	She works from home on Fridays.
(4) under (answer)	Under is used for the conditions or circumstances in which something happens. Fixed pairings: under pressure, under these circumstances, under these conditions.	The doctors worked under very difficult conditions during the flood.