Why no sự khủng hoảng as elsewhere?
I entered the sentence above, but used "sự khủng hoảng", which was not accepted. Is it really wrong? It should either be added as an accepted solution, or the drop-down hint should be changed, since "sự khủng hoảng" is the only one given.
I suspect this is like thàng công/sự thành công, both are right, but there are exercises here that only will accept one, and I agree if so that needs to be fixed.
The hints do not have just 'khủng hoảng' and these need to be updated.