fall to someone
phrasal verb with fall verb uk/fɔːl/ us/fɑːl/ fell | fallen
（职责、任务）落在…身上，由…承担
to be or become the duty or job of someone
The worst job fell to me. 最糟的活儿落在了我头上。
it falls to youformal 应该由…做…；…落在…头上
it is your duty
It falls to me to thank you for all you have done for the association. 我应该感谢你为这个组织所做的一切。