Fill in the blanks
So many people died -----(of / from)cholera last year.
Therefore the govt hospitals this year ------( has been / were / is / are being)instucted to keep special wards for the patients.
The nursing staff has been advised to offer first aid immediately
.-------(When / as soon as / immediately / no sooner did ) I reached there to collect data , I was mistaken to be ------ (the / some / a ) patient .