Read about Washington, D.C. Use the if necessary.
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To know your onions- знать своё дело, отлично разбираться в чём-л
When it comes to the cars,he really knows his onions.

To buy a lemon — купить что-то плохое по качеству
The people who had a new gadget have bought a lemon.

To put all your eggs in one basket-поставить все на одну карту,рискнуть всем
He lost his money because he had put all his eggs in one basket.

A big cheese-важная персона, большой начальник
His father is a big cheese in one of the international companies.

Bread and butter-средства к существованию, заработок
Teaching English is her bread and butter.

To know your onions- знать своё дело, отлично разбираться в чём-л
When it comes to the cars,he really knows his onions.

To buy a lemon — купить что-то плохое по качеству
The people who had a new gadget have bought a lemon.

To put all your eggs in one basket-поставить все на одну карту,рискнуть всем
He lost his money because he had put all his eggs in one basket.

A big cheese-важная персона, большой начальник
His father is a big cheese in one of the international companies.

Bread and butter-средства к существованию, заработок
Teaching English is her bread and butter.