eager beaver
A person who is always eager to work or do anything extra, perhaps to win the favor of his leader or boss.
Человек, который всегда жаждет сделать что-нибудь сверх меры, возможно чтобы получить расположение руководителя.
Jack likes his teacher and works hard for her, but his classmates call him an eager beaver.
The man who was promoted to be manager was an eager beaver who got to work early and left late and was always offering to do extra work.
The new accountant works all the time - first to arrive and last to leave - a real eager beaver!
Новый бухгалтер работает день и ночь – первым приходит и последним уходит. Настоящий энтузиаст!
My brother is a eager beaver, he always learn something or read.
Мой брат ботаник, он всегда что-то учит или читает.