Теория:

To speak about shopping, you need the appropriate vocabulary. Part 1
 
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To do the shopping - buy things from shops;
        
To go shopping - go to the shops;
                            
Window shopping - the activity of spending time looking at the goods on sale in shop windows without intending to buy any of them;

Choice - when you can choose between two or more things;

Cheap - not expensive, or costing less than usual;

Expensive - costing a lot of money;

Long - continuing for a large amount of time;

Short - having a small distance from one end to the other;

Tight - fitting your body very closely;

Big - large in size or amount;

Small - little in size or amount;

Wide - measuring a long distance or longer than usual from one side to the other;

Loose - large and not fitting tightly;

Cash desk - the place in a shop where you pay for the things that you buy;

Cashier - someone whose job is to receive and pay out money in a shop, bank, etc.

Examples:

I got a cheap flight to Spain at the last minute.

It's too expensive to go out every night.

She is wearing a tight skirt.