fall on (someone's) shoulders

Translations
ложиться на (чьи-то) плечи
The responsibility for the project fell on her shoulders.
Ответственность за проект легла на её плечи.
Definitions
To become someone's responsibility or duty; when a task, burden, or obligation is assigned to or expected of a particular person.
Words
fall

verb
лечь
on

preposition
на
someone

pronoun
кого-то
s
притяжательный показатель
shoulders

noun
плечи