+ rewrite the sentence so that it has the same meaning as the one before
13. he is carrying out a research on how people spend their money for clothes
a research……………………………
+ rewrite the sentence so that it has the same meaning as the one before
13. he is carrying out a research on how people spend their money for clothes
a research……………………………
a research on how people spend their money for clothes was be carried out by him
=> A research on how people spend their money for clothes is being carried out by him.