fall tosb
—phrasal verbwithfallverbuk/fɔːl/us/fɑːl/fell|fallen
to be orbecomethedutyorjobof someone
（职责、任务）落在…身上，由…承担
Theworstjobfellto me.最糟的活儿落在了我头上。
it falls toyouformal
it isyourduty
应该由…做…；…落在…头上
Itfallsto me tothankyou for all you have done for theassociation.我应该感谢你为这个组织所做的一切。